Ours took ages!!
After we sent ours away, it took almost ten weeks for it to arrive. In that time they charged us too much money on the credit card, then informed us that the certificate pack we ordered was no longer available, and that since posting ours away the price had gone up, so they wanted to charge us yet again, even though they had taken out too much in the beginning.
So by the time we got ours it was about ten weeks.
Medicare took even longer. First they lost our details after bdm received it, then when i checked up on it, they got it sent out to us, on the card they spelt both mine and our daughters names wrong. So they had to send out another one.
DD was born in september, we sent everything off just after she was born and we got everything back just before christmas!

thankfully though, no one else seems to have had such an experience with them!
By the way, I would give them a call and see whats happening. It might hurry it along!