Incorrect Information and lack of accountability

I upgraded my package early January 2016 to a 12 month 5GB data contract via telephone and was advised very specifically by the consultant that I will not be debited at all on 31 January 2016, but instead only be debited with R 289.00 on 1 or 2 February 2016. I now see that I will be debited on 31 January 16 with R670.00. I specifically confirmed as I did not want to be debited twice. I have since not been able to load any data on my phone so any usage was supposed to be on my call limit of R 150.00. This reached its limit and my line did not cut off as per normal or as per my instruction, but instead carried on using data out of bundle. I was still not able to load any data bundles, the 111 was not going through and I could not see my account on \MyVodacom"it gave an exceptions error message. I called recently to have this investigated and promised a call back which I still have not received. When I call now the systems are offline...I have made numerous attempts to have this issue resolved and now I am sitting with a bill of R 670 in Jan which should not go off and another of more than R3500 to go off in Feb! I WILL NOT pay for your system issues & incorrect information given!"""