MY AIRTIME KEEPS DISAPPEARING

Good day,<br> <br> I have been having a problem since August when I load my airtime after 5 or 10 mins I am left with a zero balance and when I call MTN I am told that my phone has pages running and whereas there is no pages running... All Apps have been closed.... several times I have called the call center and I have not been assisted but rather I have spoken to *********** rude staff members who send from pillar to post.... I have lost close to 650 airtime... and again when I call I am told how Iphone consumes airtime!!! I AM REALLY DISAPPOINTED BY THE SERVICE MTN HAS GIVEN ME, WHEN I ASK FOR MY AIRTIME TO BE REFUNDED I AM TOLD THERE IS NOTHING THEY CAN DO ABOUT IT.<br> <br> PLEASE HELP ME RESOLVE THIS ISSUE?