I rang again on Friday and spoke to a different person. He didnt ask for an ASA number of the retailer the box was bought from. He said if once they get the box, the serial number shows on their system that the box is no longer under warranty then they will ask for a copy of the purchase receipt.
My box was booked in on Friday and collected the same day by City Link.
I did contact the company on ebay I got the box off for their ASA number and had no reply. I guess the safe thing to do is if buying on ebay make sure you buy the box off a company who are an ASA of SKY.