Sorry that I forgot to reply. So you are mostly facing problems because customers don't know what Bitcoin is and how to pay, right?
Mostly. 4/5 orders cancelled due to the fact that people have no clue what they're supposed to do on the site.
Wow, that's quite high. I see there is a need for counter measures.
yeah... how about you let new users only purchase something if they have the amount in their bitmit wallet? I guess that would be the easiest solution
What about a random challenge string, with instructions on how to sign it with a funded key, which then verifies on the blockchain that the user can afford to pay? Quite a bit more difficult, but at least nobody would have to trust BTC to bitmit's wallet, or go the completely opposite direction, bypass bitmit's wallet and escrow completely.