Usually what I do if I have a faulty product is get it repaired or if it's within warranty, I get another.
Yes, my friend, and that is EXACTLY what I'm trying to achieve here. And since I bought it in may 2013 I am still within the one year warranty. But so far Xim (the company) just seem to want to invent a billion different versions of "Have you tried turning it off and on again" instead of actually just fixing it.
I still have the receipt to prove it. And the fact that I bought it from Ebay should make zero difference.
I don't speak officially for the XIM team, but as far as I've understood the warranty only extends to the purchaser. If you bought the Edge from a 3rd party (in this case an Ebay seller), then the warranty does not carry over, receipt or not.
At this point, and as others have suggested, your best option is to contact the XIM store and see about sending it in for repairs.
As to the claim of the XIM team running you around, trying different solutions instead of "owning up to a faulty unit", I know that their is a very good reason for this. Their failure rate is phenomenally low, to the point that almost all of the issues that arise can be resolved by eliminating faulty equipment OTHER than the XIM. New mice, keyboards, USB cords, controllers, et al, can be blamed for 99% of failures. When support suggests that you try those options, they have a vast history to base their suggestion on.
Now, if those suggestions prove to be inadequate then I know they are more than happy to continue to move forward with a return/replace/repair. But if they didn't eliminate those other items as the cause and just went ahead with a return/replace/repair, then you'd get your new unit and have the exact same problem ... which would be a waste of time and money on both ends.
Just some food for thought; hopefully you can get your unit straightened out.