When you encounter the following problems when paying with a credit card,
1.Transaction declined (High risk transaction)
2.Transaction declined (Do not honor,Please contact the issuing bank to confirm the bank card payment limit)
3.Transaction declined (invalid card) - Credit card number is invalid. Not permitted on card.
Pay again after about 10 minutes and try a few times.
Or try to match the mailing name with the billing name.
Or contact the issuing bank.
Or use paypal.