As for the buyer lodging a dispute with Ombudsman: sellers can, buyers can’t.

What is that based on TB?

I have, as a buyer, filled in the complaint form as have several other regular posters.

In mine and other cases I know of if you are in the right then Paypal will cave in without it actually having to go through to the next stage but there is nothing in the on line form that appears to preclude a buyer applying and a case number being assigned.