over charging monthly subscription

<p> ADT sent a letter at the beginning of September informing me of their increase in monthly subscription rates. I emailed them an informed them we do not need Armed response anymore and to downgrade us to Alarm monitoring only as of the 1st October 2016. This was never done after I received emails from their accounts department informing me that this would be done. They have continued to over charge us this month. This is the last straw. The service in our area from ADT is appalling. I demand a full refund and the correct amount to be debited from my account. If this is not done I am cancelling my subscription immediately and we are going to Premier Security. I am not impressed by ADT and its pathetic customer service.</p>