MWEB - Bad Service!!!!! Charging for DATA that hasn't been used

We have an MTN ****le through Mweb which we had been using for years. Suddenly , for the last three months we have been charged ridiculous amounts for data, but the ****le hasn't been used. When contacting MWEB , we get told that the data was used and no further information. The data cannot be used , as the SIM in out the ****le and lying in my drawer. WE NEED IT CANCELLED!!!!!! every month the excuse is that it will be cancelled next month , next month comes , we get a R1000 data bill and the excuse is once again , it can only be cancelled next month . HOW IS IT POSSIBLE THAT WE ARE USING DATA WHEN THE SIM ISN'T EVEN IN THE ****LE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

i have already had debit orders go off the account amounting to R5000 of data which is NOT USED!!!!!

Please can someone sort this out immediately!!!!