False advertising

On my app there was a competition to play to win an upgrade. The next thing I know I was charged for the upgrade that I won. Keep in mind I was on a 24 months price lock of R369. 00. I always call multichoice to fix their problem but the very same problem will happen the following month. I have to call them all the time and they are not very helpful. Now they can't change it back to my old price lock because of my *uograde" Why the hell are they charging me for an upgrade I won? It even states that I don't have to do anything, they will do it for me. Another thing is it didn't mention how long was the "upgrade" for? In short, they sold me their completion. Now one of my debit orders bounced because they double charged me even when I called them on time to fix it. I'm so not happy with multichoice . Now I have to pay R379. 00 while it's still under a price lock of R379. 00 but I was not allowed to change it for 24 months