Your alpha preorders are worthless; I doubt anyone would take it for free, let alone give you any money for it. Just the remaining balance alone, ignoring having to pay you for the deposit, is 1000 pounds and the miner is what, 10 weeks minimum from shipping if it ever even ships at all? For 1000 pounds one can get the same hash delivered TODAY.
My suggestion would be to take them up on the refund offer. 50% is better then 0%.
We haven't been following the mining scene at all in the past few months, and this was paid for by the Dogecoin we mined so it's not a big deal.
I did a quick search out of interest, but I couldn't find what you were referring to: the A2 devices seem to range between ~2000-2400 USD for 18Mh/s which is roughly the same as this but you can only get the better prices with a high-priced group buy; the Titan looks pretty good but it's not shipping yet? Also, where did you see there was a 50% refund, I've not seen that (I believe Alpha-T offered order cancellation up until a few months ago, but that time has passed.)