Hello there.
I apologize for the experience you had with the support, @PPVBruce. Please know that this is not what we want you to have. Rest assured that we'll pass along your experience here on our end so we can better the customer support we provide to you and other users.
Pertaining to your issue in which you can't complete the subscription process due to a certain bank error, I'd recommend using another credit card instead. With this, we'll be able to identify if the problem has something to do with the bank.
However, if the issue persists even after using a different card, I'd suggest contacting our Customer Care Support. I know you've already contacted them but it's the best thing to do since they have the necessary tools to look at your account securely and find out the root cause of this issue.
When subscribed to QuickBooks Self-Employed successfully, here's an article that'll help you in case you need to make changes to your billing and subscription info: Update your billing and subscription info in QuickBooks Self-Employed.
Please don't hesitate to hit on the Reply button if you need further assistance in managing your QBSE subscription. I'll be right here to help you thoroughly. Keep safe.
