Are you unable to keep a track on your kids? Then, that is not a good move because your kids may get in a bad company. Children in their growing age get attracted towards negative things because they want to experience as to why elders prohibit them from doing or eating certain things. If you have provided cell phones to your children, then I will put the blame on you because cell phones are one of the major factors for children to get into things, which they are not supposed to.
If you think your children are into drugs consumption and/or selling, then you need to take prompt action because if you delay things, then you are going to lose your children to drugs forever. As you know, there is no coming back when someone is into drugs and all, so it is better to pull them out of this deadly trap. What you can do is, you can hire a private detective to keep an eye on your children and accumulate proofs against the people who are selling drugs to your children. If you live in Indonesia, then you can search for a private detective in their local language, i.e., Indonesian, where private detective Indonesia means ‘jasa detektif Indonesia’. Hope you find a reliable detective who can help you protect your children from the mess they have already gotten into.