They sent me this e-mail:
[size=11pt]Thanks for your e-mail. Your refund will be 100% of the amount paid, including shipping, if we confirm the headset you received is indeed defective. If it is normal quality for this item, then shipping would be non-refundable and a re-stocking fee of 20% would also be applicable. We have offered to send a brand new headset, free of charge, and it seems that you have declined that offer, so return shipping would be your responsibility. [/size]
They deny that it's a fake pair. I did talk to a customer service rep on amazon and explained what happened, they said if I don't receive a full refund to file a claim against the seller. I'm sending the headphones back tomorrow, then I'll just have to wait and see if they send me a full refund (I don't think it's gonna happen).
I was wondering, maybe the seller doesn't know they're fake? (Unlikely though)