Overcharged for 3 months!

I have been battling to get my account sorted with you guys since I moved over from Nashua Mobile. 3 months and counting! For some unknown reason you guys activated BIS on my account, bear in mind I have a Samsung Galaxy S4, heavens knows why I need this service. I phoned and logged a query as soon as I saw this added on my account. They said they would sort out. I then confirmed that BIS was removed at the Hemingways branch. Then the deductions started coming off and low and behold I have been charged for this. I then complained via facebook and Kagiso started assisting me. He assured me that it has been deactivated and that I would be receiving a credit this month for R118.00. This month I have been over charged yet again and guess what NO CREDITS. I want this sorted immediately!