YOU SAID:
i would like to pay with my credit card please
INTO JAPANESE
クレジットカードでお支払いしたいのです
BACK INTO ENGLISH
I'd like to pay by credit card.
INTO JAPANESE
クレジットカードで支払いたいのですが。
BACK INTO ENGLISH
I'd like to pay by credit card.
That didn't even make that much sense in English.