Thanks for getting back to us, richgilb.

I'd like to get this issue about uploading your Paypal CSV file resolved. Here in the Community, our top priority is the safety of your account. With this, I'd recommend contacting our QuickBooks Online Support team again. 

You can inform our representative about the unresolved issue regarding CSV files so they can trace your previous case. Then, have them investigate further above the problem.

In the meantime, you might want to check our Help articles page for future reference. From there, you can read great articles that can guide you about banking, income, and expenses  to name a few.

Please let me  know if you have other concerns. I'm always around to help. Take care and stay safe.