I've just called CS and went through to a Scottish call centre. I explained I called a week ago and was informed I could have the upgrade and I was recently given the firmware update for my modem.
After a couple of minutes looking through the system he informed me I was upgraded on the billing system but not given the upgrade. Within a further 30 seconds he upgraded my modem to 10mb.
I was very calm and polite on the phone and that wouldn't of changed if he said I couldn't have it but I would of requested to be moved back to 2mb for the time being if I couldn't have it. I thanked him very much.
Maybe you should speak to someone from the Scottish call centre.
First speed test shows:
Downstream7179 Kbps (897.4 KB/sec)7753 Kbps (inc. overheads)
Upstream497 Kbps (62.1 KB/sec)536 Kbps (inc. overheads)
It's not 10mb but I don't really care that much, it's a lot more that 2/3mb and it will no doubt get better as they tweak the system.
Good luck!!
By-the-way