DSTV bad treatment for a loyal client

I have been a DSTV clients for many years but I am so abused by this company. Every damn month it's a new amount I know nothing about, when I call they keep quating stuff I don't know. They change my payment dates, they disconnect me whenever they feel like . They keep adding services I ddnt request and changing my subscriptions, I have been calling every month , send messages on Facebook, I email . I have done everything to get this account on track but they keep treating me whichever way they want. I don't even know what I am paying for or whatever. They send me bills I don't know with amounts I don't know with services added or removed. It's like everyone who works at multichoice plays on my account or learns to use the computer by using my account. I have been loyal and I upgrade their products and services but they treat me really bad and I keep complaining but nothing is changing. ?