VODACOM SIMPLY CANNOT SUPPLY ANSWERS + SORT ISSUES

I discovered that one of my contracts (nr *** - a Data line capped at R159-00 per month - which contract had been running for approximately 3 years), had attracted HUGE monthly charges, being R69.00 June 2014, R240.32 July 2014, R433.66 August 2014, R1816.04 September 2014, R3393.69 October 2014, R4011.64 November 2014, R1094.01 December 2014 (I cut up and STOPPED the account on 22 November 2014) and R75.00 January 2015, then R206.92 February 2015). (A total of R11 340.26 over a span of 6 months?) I lodge an official complaint and enquiry with Vodacom in respect of this issue during November 2014, Service Reference Number S3-1Z13KK-KZKOL, and was told the matter would be investigated by the data department. The feedback I got was that the contact had been telephonically upgraded to an \open"contract on 7 August 2013. I requested a copy of the voice recording where this upgrade was allowed"