Disgusting service from adt!!

I am highly disgusted with ADT. My mother had a contract with adt, when she passed away I have been trying to cancel the contract. First I phoned them, spent 20 minutes on the phone doing a security check and going through all the reasons why I want to cancel the contract, only for them to tell me I cant cancel over the phone I need to send an email and they gave me an email address. So what the hell was the 20 minute phone call for, they could have just given me the email address. But anyway, I sent an email, and waited almost a week for a response, only for them to want to do the whole security check again. Finally when we got through the security check, with them each time taking a week to respond to my emails. Then they tell me I need to give one calendar months notice, which I already did, but its their fault for taking so long to answer. They also want to come and remove the system, which by the way was bought and paid for separately from the contract, so they dont own the system, and they are still debiting the account!!! ADT your service is pathetic! And you should definitely find a better way of dealing with clients especially when its the family members of one of your clients that passed away. Its been a bit more than a month now, they havent answered me in the last 2 weeks, the account is still being debited and Im not even sure if the contract is cancelled. So now I will go the other way and block them from the bank side! At least the bank gives me better service!! I will never use ADT for myself or recommend them to anyone!!