Airtime dissapearance/Theft

Hello Peter this morning Vodacom took away my Airtime worth R80.00 and when i called their customer service line they sent me to a Robot by the name of Tobi. The robot told that my airtime was spent on subcriptions. I don't have any subscriptions at all and this has never happened to me before. Seeing that i could not get a human response from Vodacom, i went to their twitter page and complained about the disappearance of my Airtime and they told me they cannot bring it back. I am verury dissapointed with them and want my airtime back with emmediate effect. Please help me get my Airtime back. From here onwards if they don't honor my request i am emailing the Telecomunications ombudsman. This is ****************. Thank you.