worst service ever MTN SUCKS What happened to my airtime???

<p>MTN is the worst service provider my airtime keeps on vanishing into thin air! I called the call centre and did not receive any service all I was told was "your apps automatically update" when she did not even take my cell phone number to verify this !! I am on prepaid I buy daily airtime and data bundles, immediately when I switch on my data my airtime vanishes but the data is still there how???? Its not enough that your data is ridiculously expensive now I have to buy artime that I don't use. I demand answers because I don't get any joy from this network just frustration.</p> <p> </p> <p>What is happening to my airtime???</p>