Let me get the help you need about your banking concern, @Charlotte42.
To start, can you verify the name of the bank account to which you're receiving an email? Any additional information will get us closer to the resolution and check if there's an open investigation about this.
Since you've mentioned bank connection has been updated, I suggest disregarding the email received.
To know what you can do when having issues with your bank account, take a look at this article for a guide: What to do if you get a bank error or can't download transactions in QuickBooks Online.
Once bank transactions download, you can now start categorizing or matching them to straighten out your books. After that, you have the option to do your regular bank reconciliation.
Keep me posted on how things go on your end. I'll be around to provide further assistance about your banking concern.
