To confirm, are you seeing an error message that states you've added a payment method too many times?
This may occur if you've attempted to add a payment method on file too many times and the system displays this error message. This usually clears after 24 hours, and you can retry inputting your payment method. Prior to re-entering your card information, I recommend contacting your bank to resolve any banking issues beforehand.
If this time period has passed, and you're still unable to add a payment method, you can reach out to our team via the Shopify Help Center.
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