2nd request for matter to be sorted out, still receiving harassing calls and emails !!!!

A consultant from adt cam to our house to draw up a contract for adt security as we just moved in to our new home. The consultant then explained to us that it would be a two year contract, then i asked the consultant (cannot remember the name as this was last year december ) if it would be possible to cancel this contract if need be. he then said to my husband and myself that we could cancel this as long as we give a months notice. In december 2016 the first premium went off my account and i realised this was too much to be paying for such a service and i then phoned adt and explained to them that my financial situation at the moment was not very stable and i would not be able to afford this premium and told them that the consultant said that we could give a months notice to cancel. They refused to even listen to what i had to say and did not want to cancel at all. they had no empathy or sympathy, just point blank refused on an email. I do not feel that i should pay for a service which i am not even benefiting from or cannot afford. And now i am getting nagging calls from debt collectors