wrong billing and horrible service

My phone stopped working accept for receiving calls and sms on the 13th January 2016 afternoon. when I finally managed to go at the Vodacom Seapoint on Friday the 15th January 2016 and was told that my phone had been soft-locked due to my high usage of up to R10 500 in just around 12 days, which doesn't make sense when I have never ran a bill that high in a full month, let alone 12 days plus I always pretty much use my phone the same. after I asked to lodge an inquiry into the wrong billing, i was promised that they have opened an inquiry and will send me a reference number by close of business which they have not and also that I would receive a call form one of their consultants within 24-48 hours which I am still waiting for. I am extremely unhappy with their wrong billing and bad service and I have suffered with my business/job searching/personal due to not being able to call/sms/receive whatsaps and use internet. I just want to sort out this mess as soon as possible and leave Vodacom to its competitor for better service and billing.