Maxis keep deducting me GPRS

Recently I really have no idea why but hotlink keep deducting me for GPRS!!!! Happened so many times already.

Day 1

I top up RM30 and the next day i been deducted RM29 plus and I was left with RM0.18...I have no idea why...When I called and complained, they said they dont know why...and will handle my case to someone bigger and it will take process of 3 - 7 days and no one called me back.

Day 2

I top up RM 10 and been deducted rm 9 after one SMS...I called and complained and they said the same reason GPRS????????????

Hotlink...I never used any and u deduct me

Unsatisfied Customer.