3G DATA REWARDS NOT RECEIVED

I USE TO RECEIVE MY 3G DATA REWARD FROM FNB EVERY 5-9DAY OF THE MONTH LOADED ONTO THE CELLC SIM THEY SUPP****. THE LAST TIME I RECEIVED MY DATA REWARD WAS ON THE 9TH OF APRIL. I HAVE REPORTED THIS TWICE TO FNB BUT I HAVE STILL NOT RECEIVED MY DATA REWARDED IN THE LAST FEW MONTH. EVERY OTHER SERVICE I RECEIVE FROM FNB IS GOOD BUT THIS ONE SERVICE FAILURE IS MAKING ALL THE OTHER GOOD WORK UNDONE.