incorrect suspension of cell service

I am a PAYING customer of 8ta and on the 16th of March 2016 had my service interrupted due to an outstanding fee of R458 - their customer service confirmed it was an error by 8ta and they billed a 5gig data bundle I never requested (I have unlimited Data for 3 months). I was the first to pick this up and called your call centre and requested a query be logged to correct this on the 28 February 2016 and was told it takes 72 hours (SLA) - then a week later I called again and confirm was my monthly payment is and that was SMSd to me by 8ta - 5 days later my cellphone service was cut off for that outstanding amount THAT I DO NOT OWE - I have in the past 4 days called the call centre over 10 times and hung up on 3 times - placed on hold for an hour at a time - told that the billings department cannot be contacted telephonically to fix this - I have to wait 72 hours with no cell phone service - their supervisors Brenda Tshikhudo & Noluthando Nemudzivhadi - had the audacity to tell me to pay this money (that I do not owe) and my service will be reconnected and the money refunded to me - day 4 still without any cell service and their call centre telling me there is nothing they can do!!!!