Redirect payment is not working

Hello everyone,

I am not sure if somebody can help me with this one. About a year ago I moved my website to wordpress.com and installed a redirect link from my .org page for about 13 Euro. Now the payment was refused because the payment data is incorrect. I know this, but where exactly can I change my payment data? I cannot find an option in the categories such as tools or plugins.

Maybe someone knows the (easy) answer?

Thank you!