VODACOM Pathetic Service

Hi we have paid our vodacom account that was in arrears and when we query about the data that was owed to us they say that the data is forfeited. What did pay for because we paid for data which we did not receive. They billed us every month for the data which we did not receive so now we paid but still have not received the data that we paid for.We called and spoke to them they just cut the call when we query about the data. This is very unprofessional because when we made payment the consultants advised us that we would receive all the data that was owed to us.Pleae advise wat did we have to pay for data which we did not receive ?