Wrong billing and no communication from telkom

So I signed up for that terrible uncapped package of telkom that gets slower and slower every month. The constant downtime of telkom has lead me to cancel and go back to my previous provider. Anyway I was paying a R733 monthly installment. I gave my months notice and was billes an amount of R1200 some couple odd. I have tried to call telkom to get clarity on why I need to pay almost double my installment. They dont answer their phones. I have been to their stores at Eastgate mall and they cant help, they ask me to call their accounts dept so Im back at square 1. I then tried Facebook, they twice rep**** to me that they would get back to me with feedback but still nothing, so they just forget about you there. I am hoping hello peter will get them to resolve this issue. I have had the misfortune of dealing with telkom on a different issue altogether and even though I should have learned it seems my stupidity has got my fingers burnt yet again. I WOULD NOT RECOMMEND ANYONE USE THEIR SERVICES BECAUSE THEY ARE ROTTEN ALL THE WAY THROUGH TO THEIR MOBILE DIVISION