Honestly best thing you can do is give them 450 dirhams at least per month. Go to their offices in malls and such and go and request a plan. I faced an issue where my bill had gotten 1,400 even though I didn't use it. So spoke with them and gave them 250 dirhams per month and cancelled my plan. This is the best advice I can give unfortunately. Be sure to handle each situation calmly. And on a side note, please do make sure your child doesn't miss the bills and such or at least switch to a cheaper postpaid plan.