worst service and overcharged every month

I signed up for Telkom's 20gb promo online for R299.00 p/m a consultant called me back and said that I would be deducted R299.00 and my first bill would be for the first full month of use and the pro rata portion for my usage on sign up, and a credit will be shown for for the initial R299 pre debit paid. well my first bill the deducted the pro rata and a full month and since then I have been fighting to get my R299 refund.. my case number has been marked as resolved and after speaking to I don't know how many service consultants I still don't have an answer on when or if I will be credited. how can something be marked as resolved , but absolutely nothing has been resolved and I have had no feedback.. in addition I am being debited incorrectly every month on my account... this is pathetic.. and not what I signed up for and the fact that after about at least 10 calls and how many emails absolutely no one gets back to me on what's happening is appalling... I have also attempted to take the matter further, but no one is willing to give me a contact to escalate the issue.. so month after month goes by and my money is in the hands of Telkom.. Pathetic service and in my opinion they might as well not even have a help line or support number as all it does is make a person more and more agitated as you get the same bull***t story every time you call. my case number is ********** 3