Incorrect billing - no feedback - poor service

I have 3 contracts with Vodacom, 2 cellphones and 1 data contract. I have been a customer for well over 10 years. I noticed that I was being charged incorrectly on my bill. Firstly on my data contract, I am paying for content services I did not activate - I think I queried it at the beginning of last year and on my web profile it shows content services deactived in March14 - yet I am being billed for this every month. On my cellphone contract - phone number ending in ...45 - I am also being billed for content services that I have no idea about. This has been going on for over a year. On my contract ending in ...46 - I have been over charged for my data purchases - I bought 500MB of data for R59 and when I purchased data again the charge on my statement for the second round of 500MB of data was R117 rand (approx.). How is this possible - I only checked for one month - how many times have they over charged me and other people? I am also being charged absurd amounts for data during the night (when my night owl data should kick in any way) at midnight in the week - when we did not download anything. I called and complained about this - I am waiting almost 3 weeks for feedback