Excessive billing and no assistance

My Contract is 2 GB/mth for 2 years for R89/ month. On 14th January Autopage suspended , data sim card due to high usage. Account was over R11 K. I requested a URL rapport, never received it. In the meantime I went to Vodacom and purchased pre-paid sim card, which have been in device since 14 January. Yesterday received statement from Autopage that shows data usage from 17 Jan to 16 Feb was R1355.99 - 1561.45 MB ..I called several times, get through to accounts, they transferred to customer services, then line cut off. I emailed them and this was snotty reply back::::Kindly note that the charges are up to the 13th Jan is that not the last time you used our sim? <br> Detailed billing show data usage 17 Jan to 16 feb, should have been NO data usage. On 14 Jan I sent a request to migrate my subscription to the Top Up package, to prevent this situation in future, nothing was done. I requested cancellation of the contract yesterday. Contract end in Dec'16, cancellation quote over R7K how is 10 month x R89 over R7K. All I want is URL rapport, them to investigate how data can be used if a sim card is not in a device and migrate my contract to prevent future excessive billing.<br>