Hi Guys,
Thanks for the advice. I'm happy to say that it all appears to be sorted now. I contacted the next of kin and they were extremely helpful in getting the talktalk line cancelled. I'm amazed talktalk reacted as quickly as they did.
Stephanie - thanks for the offer of help. I wonder if you can provide some further advice for me. Before the move I arranged with BT to have my account/line moved over to the new flat. As mentioned above there were issues with this so while waiting for the talktalk line to be cancelled (being aware of how long the broadband/new line order would take) I contacted BT again to get the line activated at a later date and to add broadband to it. I found out after placing the order that the broadband/phone order was under a different account number to the one i've had for 2 years. I asked why the order could not go onto the existing account and the lady said that there was an order pending on that one so she could not add the new order to it. She said to contact BT once the broadband is installed to get the existing account moved to the new account.
The broadband was successfully installed today (yay! relieved that the dates worked out as they did). However, on having internet access again I find that BT have billed me on the existing/old account number. I called to cancel this one and have the credit transferred to the new account but was told that there will be a 14 day notice period (for a line I don't have on an account number I was later told was closed as the move was unsuccessful). I was told that a new 12 month contract had started on the old account number - I don't even have a line with this account!
So now I've arranged for the old account with my old telephone number to be cancelled. I made sure she would cancel the old account and not the new account that my broadband is with. I really hope they don't mess this up and cancel the wrong one.
I wonder how I ended up having two account numbers in my name, paying line rental for 2 lines at the same address and being entered into a 12 month contract for a number I don't even have. I've been told I may have to pay cancellation charges for the phantom line but have to wait and see. My problem is I keep getting through to someone new who I have to explain the situation to again and again. In hindsight, I wish I had just cancelled my BT account with the move and then opened a new one after the move. Oh well, I now know better for next time.