unauthorised debits

what a pathetic service I'm experiencing and i have been a loyal customer for more than 3 years.

i have an authorized debit on my accounts an its starting to annoy me because i now always have to pay unpaid fee and its nonsense. its been almost 4 months battling with your guys and its getting worse . i spoke with Esther Sithole November and i asked her to arrange that ADT debit my account twice for that 1 month service that im apparently behind but that has not happens instead i have a unpaid fee of over R500 that i must pay . the arrangement was that ADT debits my account twice on the 20 Dec but they didn't honor their agreement they keep debiting when ever they feel like it . 22 Dec , 30 Dec and 6th Jan ADT has been attempting to debit my account and it keeps bouncing as there are no funds in the account. please stop with your an authorized debit in my account i will that 1 month i owe manually STOP WITH YOUR DEBITS BECAUSE UR IMPACTING MY ACCOUNT NEGATIVELY . NOW MY COST ARE DOUBLE. I STARTING TO HATE ADT NOW . I HAVE TRIED CALLING ESTHER BUT HER NUMBER JUST RINGS CANCEL THAT ARRANGEMENT ITS NOT WORKING OUT FOR ME