ADT cannot be trusted

I have been in dispute with ADT over incorrect billing since January 2019. I have had work charged for and duplicated on different invoices and have had an amount of over R 700 paid for which should be refunded. Now I see that they have deducted T 3 700 from my account for work that was done but did not work so which resulted in additional call-outs, simply to add those invoiced amounts onto the previous invoice. I spoke to Mac who seems to be the big shot there and he was going to look into matters....I never heard from him again. I objected to the amount of R 37700 being deducted again last month, a lady called me and said not to worry, Mac will get back to me...he never did. Now they send a complete **** on me. I was sent a letter by Riaan Geustyn stating that ADT would be drawing the full R 3700 from my account at the end of the month. I rep**** that I disagree with the amount and by that measure, forbade the action proposed, that the funds be withdrawn until we reached the end of invoicing problems. Riaan Geustyn returned my call last week to say that he would look into the matter and that Mac would again get hold of me......I never heard from anybody again and the full R3700 has been removed from my account. To add to all of that it should be known that it took ADT almost 3 months to fix the problem.