I'm interested to know what the problem was myself. I think we all would.
I am sure that the ebay seller is just as frustrated as you were. If they knew they had sent a machine in working order, it had to be hard to know you were not happy. Also, as far as response time from the seller, well, maybe they were working or busy with family. Not everyone is online all the time like some of are. Speaking for myself there. I don't know if we are talking hours or days in that regard.