Airtime & Data not refunded

I have known for a while that other customers of MTN have had their Airtime and Data disappear and have recommended friends and family to use them and im sorry to say this but I am now very disappointed with their service. I laid a complaint with MTN yesterday the 18/09/2017 so say that my airtime and data had disappeard. I received an sms today to say that my matter had been resolved and that I had used up all my data and airtime. I know for a fact that I barely used my phone when I had received my monthly top up and this is just an excuse from their side to make more money out of their customers. I cannot wait till my contract is up with MTN so that I can move to another subscriber whom doesn't go out of their way to rip their clients off let alone ***** from them. I will not be leaving this matter!