WHERE IS MY AIRTIME GOING?????

<p>I topped up my airtime at around past six at night, using an atm. I reciveved an sms fron mtn to comfirm that my airtime was topped up. When I wanted to make a call, it said I do not have airtime and I need to top up. I thought maybe it was my data connection and turned it off, could still not make a call. I called coustomer service and my call was dropped. I deciced to leave it till the morning , my balance is still zero. Called customer service, and they decided to tell me that it is my data usage. I have wifi in my house, so no airtime or data bundles is required. The person I was speaking to suddenly had no more explanations. She said they will look into it and sms me my reference number. Till now im still awaiting a ref number. This is not the first time this has happended, this must be the third time now. I am totally fed up with Mtn, they are theives. Daylight ******ry, lets not mention how fast data is used up!!!!! </p>