Disappointing service

I need someone to contact me as a matter of urgency. I called your offices in the beginning of July to cancel my service. I was advised that I am billed in arrears so the last payment would be 01/08/2022. I was told someone would contact me to arrange collection of the router. To date nobody has done that. This month I decided to call just to see what's going. To my surprise I was told that the cancellation had not been processed. The guy who I spoke to ensured me that it would be escalated so that I am not billed another month as I had given notice. Over and above that I haven't used the service in a month and I was advised that your offices would be able to see no usage so they would not charge me because of the error on your side in not cancelling. Today Rain tried to deduct money from me. I did not have funds available as I am not expecting any deductions. My questions are, why are you still trying to deduct after I have cancelled? Who is going to pay my unpaid bank charges? What happens when my salary comes in, you going to deduct again for a service I don't use and is cancelled/ I wont be able to reverse this either as this does not go off as a debit but rather a purchase. I need answers today!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!