PAYING FOR SERVICES NOT RECEIVED

I have been with Vodacom from 2005 but I feel like Vodacom does not want to attend to my queries where at some point I was getting a pre - taped message "that they have received a lot of my calls as a result I am locked out" I gave up with the query.Now the problem is that I am being charged for airtime being billed twice that I never received from June last year and data I am billed for but receive one as a result my bill does not make sense the agent called Xolani Mchunu who was supposed to cancel this said he cannot log in he would call me after 15mins he never did.My suspicion is that someone inside is taking my airtime and data and I am paying. I just want to thank Sizwe Khumalo because after I spoke to him at least I got airtime but nothing for previous months. Cancelation of the second data and airtime I am still waiting for Xolani Mchunu this is ridiculous