WHY DO YOU TAKE MY AIRTIME?

Last Sunday called customer care because airtime bought is not equals the calls i make. I was then told that I subscribed to some service that takes R15 and was told to recharge after 24 hours as the guy has deactivated whatever service. I then ask how did i subscribe to such. I was then asked if i never sms'd to subscribe to anything. I then told the guy i am very careful when it comes to such things. I then demanded proof that i subscribed. i explained to him that with the history and experience that Vodacom will tell me i used data and later on fail to prove it instead they will just give me data.He logged a service request Sunday till to date i have not received any response. VODACOM i want my airtime back, you are ******!!!