Disappearing airtime....bye bye MTN

After so many calls to the MTN call centre, my airtime is still disappearing. I am receiving smses saying that I have subscribed to video streaming/sports/movies services which I have not requested. When i dial *141*5# to check content subscriptions, I get a message that I am not subscribed to any content services, but when I recharge, money gets deducted from my airtime leaving me with a zero balance. Please can you explain this to me??

I have decided not to renew my contract with MTN and in the meantime migrated to pre-paid. The MTN service is pathetic, how can I be subscribed to services I have not requested, this is **********! Sadly MTN, you have lost a loyal customer.