If the issue persists, I would suggest getting in touch with our QuickBooks Self-Employed Support. Unlike in this public forum, they have the tools required to perform any escalations in the system whenever necessary on your behalf.
Click Assistant at the upper right corner.
Type in "Talk to a human."
Then select your preferred support method: Message an agent (Live chat), Call an agent, or Get a callback. Keep in mind, some options are only available at certain times.
For banking-related concerns and articles, you can go through this write-up: Bank feeds. This will provide you links on how to resolve banking errors as well as other steps on how to enter and delete transactions in QuickBooks Self-Employed.
You can always leave a reply below if you have additional assistance with banking connection. I'm always here to help.