After a dispute with seller which was paid via paypal.com I contacted paypal.com to get my money back for the postal fee taken for cancelled mercandise. A lot of evidence was uploaded to the paypal.com site where the seller in fact admits that all the postal fee isn't paid back for the cancelled parts. It seems for me that the case proceedings wasn't to proffesional and they jumped to conclusions after some minutes even with 35 pages with attachment. I don't think they even read it!
The final answer to this from paypal is that I got some of the money back, anyway postal fees was not covered by the buyers protection program so they couldn't help me! I cancelled my paypal.com account immediatly!
In addition is it cheaper to let VISA do the transaction between currencies than using paypal.com.