Thanks for sharing some clarifications with us, @RobHere.

Our engineering team is working diligently in fixing the issue you're having with QuickBooks Payment (INV-71218). 

In the meantime, you'll want to manually record your transactions in your QuickBooks Desktop (QBDT) for Mac.

Rest assured, you'll be notified via email once the issue is resolved. To stay updated, I recommend contacting our Merchant support team again. There, one of our live agents can provide you additional details and updates about this matter. 

In case you want to learn how to upload older transactions in QBDT for Mac, please feel free to check out this article for the complete details: Download bank transactions in QuickBooks Desktop for Mac.

I appreciate your patience while we're looking for a permanent fix. If you have any other concerns or questions with your QBDT for Mac, you're always welcome to post them in your reply. I'll be here to back you up!