Airtime debit

I have been calling the contact centre from the 04/08 regarding my airtime that is being debited daily whereas I have data available they keep telling me hat I am debuted airtime due to internet bow,is it that happens but I have data. I am very irate I have had enough with vodacom and I keep being told I have to wait for 24hours and no one is getting back to me I will have to report this to the ombudsman as I have had enough of Vodacom. I will change to another network as clearly they are inadequate