Airtime lost

I called the call centre this morning at 9:45, and someone answered and after I told him my complaint he put me on hold for more than10 minutes and thereafter cut the call. Totally pathetic service. My complaint is as follows, I loaded airtime for an amount of R150. 00 on 29 February, yesterday. On 1 March., today, the monthly benefits were received on the straight up 100 top up package and when i checked my balance my airtime I loaded yesterday was gone. Why? I want my airtime back