No OC version posted. No payment service provider extension name provided. As for the credit card information on the Amazon account, contact Amazon support or look on Google or from Amazon's website. Unsupported.
The most generated errors being found on Opencart forum originates from contributed programming. The increased post counters are caused by redundancies of the same solutions that were already provided prior.
Programmer / Opencart Tester
Please share the OC version that you are using?
Please share complete details so that we can assist you properly.
Moreover, you can remove credit card by the method mentioned by @elenor
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