I keep getting an error that says -- We can't find anyone with __(email or phone).

Without being able to get into your account, there is no guarantee that they will stop billing you.  

They seem HUGE on even billing accounts that have been canceled for months.  

I've even seen complaints that customers will cancel their accounts, QB will stop billing them, only to turn around a few months later and start charging them again.  

You could always try calling and canceling your account.  

Good luck. 

I think this will just have to be a dispute on my credit card.  Calling them is not a good experience--they recommend upgrading your account to get higher priority service, which I obviously cannot do since I cannot access my account.  

Thank you for posting here in the Community, @fcarp.

I've checked that you've posted the same question twice, and my colleague, AlverMarkT has already added an answer. Check this link if you haven't been notified of the new response. 

If you need further assistance, don't hesitate to comment below. I'm always here to help.