I have put in a paypal dispute yesterday. I don't care how many support emails they get per day etc... When you have customers with no item or like me and others, stolen codes you should reply to them. Through these forums if you want, the silence about these issues put me off the game and the studio as a whole. All I want is a working key and at this point thats the bare minimum they should do.
Could you keep us informed on the status of the Paypal dispute ? I've also sent one, but it is still in the "friendly settlement" state, waiting for an answer from Larian. I will ask Paypal to look into it if I don't get any answer today.