In a very corrupt system, raising the attention of the authorities to issues like this will have no effect because they will turn a blind eye to it when they are offered a bribe by these owner of small gambling machines.

As a way to help the situation, try helping the kids around you by teaching them about the dangers of gambling from an early age. It may not be very effective to stop underage gambling due to the easy access they have, but it will help some, and that will be you making an effort.