Incorrect billing and *********** staff

I upgraded in Nov as i was due for an upgrade on my numbers *** & *** and i was told ill be paying R179 and R299 for the two line but at the end of the month i was billed R1876 which i phoned and inquired about and i was told it was a mistake and a case nu ***4 was opened and i'll be refunded, but till today that has never happened instead i was told the case was closed as i could not to be reached but no one contacted me instead i was reaciving sms's . In January again i was debited R1176 and i went to a west gate branch on the 3rd of February and Greg the consultant assisted me and gave me this case number ***2 and he said he has fixed the billing problem, on the 3rd of Feb 2016 the amount of R1176 was reversed and i was told it was insufficient. I phoned and asked how much i was owing no one could tell me and i was told i owe R419 which i deposited but still my services were cut off, ive been phoning for clarity but no one is telling a straight answer. I've been sent from pillar to post every time i call and everyone is telling me a different story. Today i phone again and i spoke to Kenneth who told me the case was logged in a wrong department.