Data and Airime dissapearing on this Contract ..im

Hi Hello Peter, i bought airtime for R100.00 and 1 minute later before even dialling i realised my Airtime has disappeared. Then i phoned 808 and they said i have subscribed to a .I told them i don't know about that and they should immediately cancel it and refund me. The consultant then said i must dial *141*5# to unsubscribe but then when i dialled it there was no Option for Unsubcribe. Then on the 21st Nov i received 2 GIG Data which lately disappears within a week now and when i complain to MTN they always say its Backround Data but its off and I'm always using Wifi Connection ? Please MTN i want my Data and Airtime back or I'm closing this Contract, i cant suffer like this?