I can see the urgency of getting this issue resolved. @Daniel Kaufman. 

Since you're still not getting any fix. I'm here to point you to the right department that can further assist you. 

You can call our phone support team so they can investigate why you're still experiencing this. They have the tools to pull up your account in a secure environment. Here's how to reach them.

To contact them, follow the steps provided by my colleague @MaryGraceS. You can also refer to this article for more information:  Contact the QuickBooks Online Customer Support team.

Also, missing transactions happens if there are connection issues with your bank account during the periods or potential background issue during the download. 

After the download, you'll want to match and categorize your bank transactions: Download, Match, and Categorize your Bank Transactions in QuickBooks Online.

Please let me know if you have any other concerns. I'd be happy to help.

As always please let me know how this goes or check back if you need help with QBO. Have an awesome day!