Excellent at bad service

In august 2016 adt send 1 of there sale staff out to sign us up we had an alarm already installed all they had to do was connect us to there system. To do this a technician had to come out it's been a year later we still waiting on the Technician. They toke of 2 debit orders for a service which they never gave us and at this point I called in and spoke to an manager who told us we will get 2 months service for free and she will send a technician out the next day till today this technician has not come out after this we closed our bank account and was never contacted again until December 2016 a new sales person come and told us he will sort out everything get our money refunded and we can start a new contract with adt. Until today I have never heard anything of him and no refund as well. In June 2017 we received a statement say we need to pay our monthly installment I was shocked as we are not covered by them we are covered with a different company I called in and they asked me to send banking details for my refund I send everything they needed it's been 2 months no refund just a bunch of excuses and no refund I asked to speak to management and all I get is we will send emails and get them to call you back. I have been waiting and still no respond. I will never recommend ADT to anyone because of this really disappointed.