BIS Billing

I was informed in October when I went for my second upgrade that I was still being billed for my BIS services. I found this strange as I had not had a blackberry for nearly 2 years. <br> <br> I was told by the consultant that I needed to call MTN as she could not assist from her side. So I did, I received a reference number and was told that someone would call me from MTN. <br> <br> 1 month later I had still not heard anything so I called MTN again. They apologised, but again said there was nothing they could do as they needed to log it and that it could take a week or so... but someone would be in touch.<br> <br> It has now been over two months since my initial complaint... and I am still paying for my BIS which should have been stopped over 2 years ago!!! 1 month ago my bill stood at approximately R1000 which is ridiculous and unacceptable as I am not receiving the BIS services.