Sadly I have also had this '10 digit' problem, I've been trying to RMA an 8800 GTX card since last Wednesday, firstly I got a quick response telling me it was faulty and to return it, and asking for my details which I replied with quickly. Things were looking good.
24 hours later nothing, so I emailed again asking if they had received my details, half a day later I received instructions to return the card, and another email to submit my 10 digit code.
I had no 10 digit code.
So I emailed them on Friday asking about this code and where to get it.
No reply.
I emailed them Saturday asking about this code and where to get it.
No Reply.
I emailed them Sunday (copying in Jeff Kozlowski).
I finally received a reply Monday night to one of my earlier emails saying that they had set the RMA up for me, so I got UPS to pick it up yesterday.
Jeff Kozlowski emailed me on Monday, apologising and offering me a card upgrade, which I emailed back to accept, he said he would call me so we could 'handle this right away' and to give him a time, which I did, I waited in all afternoon and evening, yep, no call, no acknowledgement to my email either, obviously his interpretation of 'handle this right away' is different to most peoples.
I emailed him again last night, expressing my disappointment.
Basically, I'm probably going to be without a properly working PC over Xmas now as their support department is so slow and useless, had they handled this properly I would have almost had my card back by now.
I'd hope with Jeff on the case things had got better, but it seems not.
I won't be buying BFG anymore, their support is certainly not 24/7/365 as they advertise.
Very Disappointed.