We don't accept credit cards. 我们不接受信用卡。
例句：
I'm don't accept credit cards,but we accept checks.
对不起，我们不接受信用卡，但是我们接受支票。
We don't accept credit cards,so you may choose to pay in cash.
我们不接受信用卡，所以你可以选择用现金支付。
A:Can I pay by my credit card?
我可以信用卡支付吗？
B:I'm sorry,we don't accept credit cards.
对不起，我们不接受信用卡。