Continuos debits after cancellation - no response

I cancelled my contract at the end of August 2015. The salesman I dealt with Nigel didn't bother to respond to any of my emails, calls or SMSes. I eventually got hold of Lance Harris the area manager who confirmed that he had received it but couldn't tell me why his salesman ignores customers.<br> <br> My account continued to be debited for 3 months until eventually they cancelled it (after double debiting one month!). I have now requested a refund 3 times with no response at all. I have sent a final letter of demand and will be instituting legal action against ADT should I get no response or refund.<br> <br> I STRONGLY advise anyone against using ADT. This problem above is only one of many we had in our short 3 month contract with them.