AIRTIME REIMBUR*****T

Dear MTN! SOMEBODY PLEASE ASSIST. MTN IS IN THE HABIT OF HAVING PEOPLES AIRTIME DISAPPEAR. THIS IS DISHEARTENING BECAUSE THE MTN CALL CENTRE DOES NOT CATER FOR SUCH QUERIES. I HAVE SPENT OVER A WEEK TRYING TO GET IN TOUCH WITH YOUR SERVICE REPRESENTATIVES SO I CAN GET AN EXPLANATION ON HOW AND WHAT HAPPENED TO MY AIRTIME OF OVER R70.00. I am now terrified to purchase any mote airtime as this is becoming the norm from MTN