Let me help you with matching transactions, Userppetera.
You'll have to record both invoice payment and refund receipt so you can match them to the downloaded transactions.
If you're unable to see any matches, you can follow these steps:
Let me share the reference on how to review downloaded transactions: Categorise and match online bank transactions in QuickBooks Online.
Get in touch with us if you need more of our help. We'll reply as soon as we can. Take care!