Anyway this seems like it might be a pretty niche product. Try Paxful.com maybe if you have a physical receipt to show for these cards? If i remember correctly the rates on those were pretty decent. (For reversible giftcards that is.)
greek paysafe card only works with greek accounts this is the problem.
if anyone wants this im selling them cheap as i have no use of them. And yes i have the reciepts in my hand bought in store.
Or perhaps you could add these paysafecards to something like G2A, buy some CSGO skins and then cash out those skins for BTC.
No idea if it's possible or actually works, but i guess you can think of something similar, you get the idea..