********** account at ADT

Adt claims that I owe them. I have informed them that I have no knowledge of any contract with them, and requested to see the contract as to who signed for that contract. I am yet to receive that contract. Instead they have handed me over to lawyers, whom I also informed that I want to see the contract. They asked for an affidavit and ID copy, which I did and sent. But yet I still get letters of demand.