Bad service - Terrible!

I called in and made arrangements to disconnect one of my decoders the schedule was made but come the end of October 2015 that decoder was not disconnected to my surprise when paying for November 2015 I discover that I actually owe 2 decoders I explain my situation to them and they re-connected me. In December the same thing happens again I called them and explained my ordeal again, they told me they will rectify it and I was subsequently re-connected only to be disconnected a few days later. I called again to find out why was I disconnected and I keep getting the same answers and go over the same thing over and over again. The last time I spoke to a lady that told me she had spoken to her line manager and they were going to credit my account which they did. Today I wake up to no connection again and when I call I am told the same old story I have been trying to explain for the past 2 months. The quality of notes they take while resolving my query is obviously Very Very Poor if I have to explain the same thing all the time. Although they have your details when you get cut off they do not even bother calling you back which means when you call in again you will get a different person