Airtime taken without any calls made

MTN have been taking all of my airtime instantly even though no calls are being made. On 06/04/2015 close to R100 worth of airtime was ****** from me. <br> <br> Also, I am unable to use any internet services even though my data says 400mb available. When I attempt to surf, I get a no funds available message. None of my Social Media apps are able to logon. I have contacted the call center twice in March and both times I have been told an investigation is launched and someone will get back to me in 7 days, up until now (10/04/2015) I have no contact. And when I am able to hold on to my airtime, my internet activity is being charged to my airtime and not my data.<br> <br> This one of many issues I am having with MTN, if you search my complaints, you will see the others. I am so frustrated, I am at my last level of tolerance. I am seriously considering going to consumer watch with my issues as well as seek legal advice as my money seems to be going into a bottomless pit