Terrible service from ADT

I am a new ADT customer. Signed a contract in Sep and agreed with the sales person (Richards Mompe) that my account will be debited on 1 Nov as I was with my previous service provider until the end of Oct. <br> <br> But despite the agreement my account was debited on 1 Oct which means that I paid for Oct service twice: to my previous service provider and ADT. <br> <br> I tried to call sales person but his phone is always off. I phoned ADT call centre 6 times and each time was promised a call back which never materialize. I filled a contact form of the website, then sent email to [Email Removed] - no response. <br> It seems that customer service at ADT is practically non-exsistent.