They don't know anything and won't even forward me to the cancellation department

I had adt come install their security system which was only the radio and I had a working battery from Chubb but they changed it that was in September and I was told month end of September I would pay for the once off admin fee R150 and radio fee R272 total being R422, which I paid R420 the 1st week of October coz I had problems with my account and I would start paying my monthly fee of R350 month end October which was successfully debited now I get a message that they gonna debit another radio fee in December and I call to find out what is going on and the girl I found I spent more time on hold than I did talking to her and she said I must send proof of payment for something that reflects on her system,,, I told her to put me through to the cancellation department and I was put on hold until I hung up