WORST SERVICE EVER

In Feb 2014 I app**** for a 24 mnth data package with a laptop at 199 per month. Every month the amount was deducted as usual. In Dec 2014 an amount of 1663.36 was deducted. I assumed that it was normal data usage and paid. In Jan 2015 I received an invoice for 4128.70. I phoned them and asked them why the usage was so high as I never recalled downloading or streaming anything. They referred me to Thandi at Vodaword branch where I signed for the contract. She was very unfriendly and did not log the incident or had a look at my hardware. I reversed the debit order since this was in dispute, and ever since they tried to deduct the same amount every month. I spoke the branch manager, Pretty on 25 Mar ref 66288. She informed that she will get back to within 10 work days. Until today, nothing. On 2 Apr I phoned again, spoke to Leso, with the same promise of 10 working days. On 5 May I spoke to Patience, who referred it to her Manager after I threatened to report them. I have requested the contract from them on every occasion, as well as the proof of the usage. I want this contract to be terminated as they did not inform me that it was an open contract, and cannot provide me with proof