Incorrect billing since last year September

My signal goes off at least three times a week but yet I'm paying my account in full. Apparently someone opened a second account under my name, and whenever I call multichoice about this bogus account(which all my payments reflect under) they assure me that the issue has been escalated to their backoffice and an agent will promise to call me back with feedback and I have never received a call back from an agent or manager dealing with my query. Today the same issue happened and I had to call them again spoke to Sindisiwe Mkhize using my airtime(spent 28 minutes)only to find out that issue was only escalated twices 19-12-15 (ref SD *** and SD ***)and 25-12-15????I'm shocked as I have reported this issue more than 10 times and I was told that the issue is resolved. I requested to speak to a manager(Nozipho & Oliver)and I was told that she is busy on a call and she will call me back which I don't believe because I have been **** to far to many times and I am disgusted at the level of poor serviced received... Multichoice need a competition