As per their terms & conditions, refunds seem near impossible. Have you approached them with request of refund yet?
They were supposed to release final details Oct 7th. My preorder from 3.5 months ago that was paid has not had a single word sent to me about it's availability. It was supposed to be end of September was the closing period of my preorder. I would not hold my breath they are on time or forth coming with information.
Exactly in the same boat as you. You can be sure I won't ever give my money to them. Can they refund us our preorder if we decide to not pay double for the A4+ ?
I just received a message back from Innosilicon (I think the use of a Chinese contact in between helped) but they naturally didn't tell anything useful. Just that "Final specs will come soon." and some reassurance on how important customers "the rest of us" are.