Query dating back to December 2014

I changed my contract from Corporate(previously with Nashua Mobile) to Private with effect from December 2014 as my company benefits had changed. My very first statement was incorrect, it seemed I was being billed for other cellphone numbers that I don't even know about. I have been calling continuously for over 6 months to no avail. I always get told that the billing department is working on the problem but I still get sms' about my incorrect balance. <br> <br> Now my service has been suspended because I apparently owe an amount of R15 000! To top that I have been calling the 808 number all day and it just gets cut off.<br> <br> I have never experienced such bad service before and as soon as this problem is resolved I am cancelling this contract.