Dissapearing Data and Airtime

I am a contract customer at MTN,On the 17th of August 2015 I received a message at about 10:38 which said that my monthly data, airtime and SMSes have been sent to my number , however immediately when I check my balance I only found the SMSes. I called one of MTN consultants who instructed me to restart my phone , which I did nothing happens.<br> <br> The 1st time when I called I was using my sim card on a NOKIA phone which is not internet compatible and the consultant told me that as we were talking I am using internet and it was impossible. We establish that there someone also using my number as I have been receiving messages from and calls by people looking for some guy I do not know. Someone has also registered this number at DSTV Cellphone services.<br> <br> The consultant told me she opened a query and she said I will get the feedback and probably my airtime and data <br> after seven working days. when I call for feedback ,every consultant I get open their new query. I am afraid that its going to happen when I receive my contract data and airtime for this months as whenever I buy airtime it disappears. I don't want to pay for services I'm not using because I cant even buy data and airtime.