Issue with ChatGPT Plus upgrade

I am writing to report an issue I encountered while trying to upgrade to ChatGPT Plus. I attempted to upgrade my account today, and the transaction was successfully processed and debited from my account, but my account was not upgraded to ChatGPT Plus as expected.

I would appreciate your assistance in resolving this issue as soon as possible. Please let me know what steps I need to take to get my account upgraded to ChatGPT Plus or receive a refund for the transaction.