ADT Security pathetic service!!!

Despite a previous complaints/requests (where I complained that I have cancelled my contract with ADT since beginning of 2020, which after a number of followups eventually cancelled and collected the system). However they continued to bill me. I pointed out to them that they billed be right at the beginning of the contract, a month before installation, I should not pay an additional with the cancellation, but ADT Accounts dept is still ignoring me. Every month they send me a statement with the so called "arrears" amount???

This is the exact reason why I cancelled with them, because of their pathetic service through-out!! I am now going to take this up further with the Consumer Goods & Services Ombudsman for further investigation and action

All future customers: be warned and think twice before you join ADT...!!!!!