I can't let this happen to you, @cats1life .
I have a workaround to help fix your credit card balance in QuickBooks Online.
With this, I'd suggest creating a Journal Entry to resolve your credit card balances. Before that, please seek advice from an accountant on this matter. They can help you choose the appropriate account to use. If you don't have an accountant, check this link to get one: QuickBooks Certified ProAdvisor.
Once confirmed, you may now create a Journal Entry. Visit this article for more details: Create a journal entry in QuickBooks Online.
Moreover, don't forget to categorize the transactions and reconcile your banking account.
Lastly, feel free to visit these articles below on how to fix reconciliation and upload bank errors in QuickBooks:
Drop a comment below if you have any other concerns, and I'll get back to you as quickly as possible. Keep safe, cats1life.