The likelihood is that the original poster's phone number has been mixed up with that of the lady on the contract (mistake, in which case TalkTalk are not deliberately falsely representing their position) or TalkTalk have been maliciously misled over the contract (in which case any false representation from TalkTalk cannot be dishonest, as it is a consequence of talking the false representation of another in good faith).
Many thanks for a clear explanation on the definition of fraud.
Obviously we do not have sufficient specific details to understand what has actually occurred here! Although I would hazard a guess that it is Talk-Talk upto their normal tricks, that they tried to dupe me with many years ago!
Some time ago my wife got approached, by a TT Rep at a local supermarket, over how they could save her lots of money on her phone calls. Thinking she was being helpful she filled up a form to "obtain more details" (unfortunately without fully checking that actual details on the form). Needless to say, they had duped her into to filling out an Order Form.
When I discovered the form (she still hadn't appreciated that she had been duped into signing an Order Form), I immediately contacted TT - but they would NOT accept my Call as I was "not the account holder" (the existing BT Line was in my name, NOT my wife's name). Furthermore, they would not speak to my wife unless she provided our Bank Details (allegedly for Security confirmation purposes, although she had NOT provided these when she had been duped). In effect, TT were NOT prepared to talk to anyone (regardless of who was the Account Holder)
I was left with no choice but to directly contact BT & explain the situation & they confirmed that a note would be added to my account stating that I had NOT authorised TT to take over my Phone-Line.
Accordingly I was a bit surprised to subsequently receive a "Sorry-you-are-leaving-letter", from BT. When I contacted BT they stated that they were required by Ofcom to take TT's instruction, even though I had stated that I had NOT authorised such a transfer!! After a lot of agro, I got the transfer cancelled.
A few weeks later, I was even further surprised to receive yet another "Sorry-you-are-leaving-letter", from BT. On contacting BT again, they told me that TT had submitted another request indicating that I had changed my mind! Obviously I had to get that transfer cancelled as well.
Whilst I was clearly annoyed at TT's attempt to take over my line, I was equally annoyed by the fact that BT were prepared to let TT take over the line when they FULLY knew it was not authorised.
A complaint to BT just obtained the standard response that they were fully complying with Ofcom Procedures, although they were unable to supply me with details of the actual Ofcom Procedure.
One of the significant things, in my case, which possibly has a bearing on the OP's case is "Who is the Account Holder"? TT had manipulated it so that I was no longer the Account Holder, as far as they were concerned!