Review ADT incompetence

I am not sure what the problem is with ADT as the right-hand does not seem to have any idea what the left hand is doing. We cancelled the ADT services on the 29th March, they subsequently took the April debit which is fair as it was a required 1-month notice. I have subsequently emailed and phoned for ADT to come and remove their radio link system and was informed that they would contact us to let us know which date they were coming. Now we received a statement to make a monthly payment! You guys are just as bad and incompetent as SABC attorneys who keep trying to collect imaginary outstanding TV licence arrears.
PLEASE COULD ADT KINDLY SETTLE THIS AND COLLECT YOUR RADIO ALARM SYSTEM. OTHERWISE, I WILL REMOVE IT MYSELF AND THROW IT IN THE TRASH FOR COLLECTION!