No reply after two month

On the 7th of February 2015 I received what I believe to be a mistake with my cellphone account.<br> I went in to the MTN store and complain about my account been too high about 800% more then the pass six month average.<br> The person at store was very helpful and told me that an inquire was lodged with MTN and I will be contacted by phone or email within two working days.<br> After one week without anybody contacting me from MTN side I went to the store again just to be told the same thing as the previous time.<br> I waited another two weeks but nobody contacted me.<br> When browsing the MTN site I decided to post an complain into my account, a reference # was given to me and an email sent saying that an inquire will take place and I will be contacted within two days.<br> Another week later I check the status of my inquire and I find it closed.<br> I ask for an optimized bill as advertised for R21-00 and received an email sowing a copy of the invoice i already have.<br> Since then i reactivated the complain twice on the web site and every time the same thing happens few days later when i check the status it shows closed.<br> Two month went pass and nothing is resolved and I just want to know what I`m paying for.