Depleted Airtime - Yet again

This is my third experience with depleted airtime. I loaded a My5 bundle and received confirmation sms at 9:14 that the bundle was active . Made a few calls to loaded numbers, but none exceeding the hour allocation. What I find discerning is that my airtime depleted whilst having an exisiting active data bundle. Re-checked my bundle balance and it said I had no active bundle. This seems to be an ongoing trend to unassuming customers. Have screenshots to show confirmation sms and call logs. Depleted airtime whilst having an active MY5 promotion. I find it coincidental that this has happened a few times, whereby airtime is being depleted. Disappointed AGAIN.