Payment Methods
This Payment Methods page explains the payment options and currency currently used for purchases through www.tstsyslab.com.
1. Accepted Payment Methods
The store currently accepts:
- Visa
- Mastercard
The payment options actually available for a particular order are those displayed at checkout.
A payment option should not be treated as available merely because it may be considered for future use or appears in unrelated material.
2. Currency
This website may support multiple display currencies, including U.S. Dollars (USD), Hong Kong Dollars (HKD), and other currency options available through the website’s currency selector.
Product prices may be displayed or converted based on your selected currency. The currency available for checkout and the final amount charged will be determined by the information shown on the checkout page.
Available currencies, exchange rates, and settlement methods may change based on website settings, payment service providers, or other relevant factors. Please review the currency and final amount displayed at checkout before placing your order.
3. Reviewing Your Order Before Payment
Before submitting payment, you should have an opportunity during checkout to review the products selected, sales-unit contents and quantities, product amounts, and any other applicable charges displayed by the store.
Please review your billing, delivery, and order information carefully before completing the transaction.
4. Shipping and Import Charges
Retail orders placed through the website checkout to eligible destinations receive free shipping under the Shipping Policy. For separately quoted wholesale orders, any different shipping charges must be stated and agreed before the order is placed.
Free shipping does not mean that destination import duties, import taxes, customs charges, or other destination-related government charges are waived.
Where applicable law places such charges on the customer, they remain the customer’s responsibility.
Nothing in this section transfers to the customer an obligation that applicable law requires LIMESTONE (HK) LIMITED to bear.
5. Payments From Non-USD Accounts
If your card or bank account is denominated in a currency other than USD, your card issuer or bank may convert the transaction into your account currency.
Your card issuer or bank may also apply an exchange rate or related charge.
Any such conversion method, rate, or charge is determined by the relevant financial institution, not by LIMESTONE (HK) LIMITED.
You may wish to contact your card issuer for further information before making a USD purchase.
6. Failed or Pending Payments
If a payment fails or appears to remain pending, first review your transaction information and check whether your card issuer has recorded the transaction.
You may then contact your card issuer for information about the payment status.
For order-related assistance, you may also contact Support@tstsyslab.com.
7. Possible Duplicate Charges
If you believe that you may have been charged more than once for the same transaction, review your card or account transaction history first.
Some records may initially appear as pending rather than completed transactions.
If the issue remains unclear, contact your card issuer and Support@tstsyslab.com with your order number and the relevant transaction details that can safely be shared.
8. Card-Security Information
For your security, do not send the following information to Support@tstsyslab.com:
- your complete payment-card number;
- your card security code; or
- a one-time card or bank verification code.
If customer service needs information to identify an order or investigate a payment issue, we will request only information reasonably appropriate for that purpose.
9. Payment Service Providers
The store accepts payments through authorized third-party payment service providers that support the payment methods available during checkout.
Currently, available payment methods include major credit and debit cards such as Visa and Mastercard.
Payment processing is completed securely through the relevant payment service providers. Your payment information is handled according to the applicable terms, privacy policies, and security practices of those providers.
The available payment methods and service providers may change from time to time depending on payment availability, technical requirements, and website settings.
No particular payment technology, security standard, or industry certification is represented unless separately verified and stated.
10. Refunds
Refund eligibility and processing are governed by the Refund and Returns page.
Where a refund is approved, it will generally be returned to the original payment method where possible and appropriate.
The time required for the funds to appear after processing may depend on the card issuer or financial institution.
11. Payment Logos
The store may display the official Visa and Mastercard brand marks to indicate currently accepted payment methods.
Such marks should be used in accordance with the applicable brand guidelines and should not be distorted or altered.
A payment-method mark should not be displayed as an available checkout option unless that payment method is actually enabled.
12. Contact
For payment-related order questions, contact:
LIMESTONE (HK) LIMITED
ROOM D5, 5/F, KING YIP FACTORY BUILDING, 59 KING YIP STREET, KWUN TONG, KOWLOON, HONG KONG
Email: Support@tstsyslab.com
