worst service to a contract holder

I have an I pad mini 1gb data top up contract for 24 months with Vodacom. last month in September my internet stopped working and I went to Vodacom to enquire and they told me that my data is depleted, I should wait for them to debit. on the 1st of October they debited R305 and still it did not work, I went the second time but I did not get proper answers and I stayed there more than 3 hours. I went the 3rd time I was told that my data was depleted and I owe R1500 because I went over my limit which was not the case since my contract is top up. the person who assisted me told me that I used R1500 of data to up date my I pad, which is incorrect because the I pad never updates software using cellular data, it only uses wifi. I was told that my number has been moved to CYBEL, when I asked what is CYBEL, I was told that they cannot disclose such information to a costumer. my contract was moved from top up to open account without my consent. from one consultant to another they speculated without knowing the real problem and they wanted to shift the blame to me. even today I am still paying for my subscriptions and still not getting the services. please help.