WOW- Good luck to you.
Ihope something works out for you and your family!
After they have tested the forbidden waters (I don’t necessarily mean your son) these teens realize their home is really the safest and really not bad after all! and they start ascendig to a comfortable level and parents have to be accepting.
Unfortunately I have seen teens and young adults, shall we say choose a different path from their parents and not necessarily doing the wrong thing and their parents have dis-owned them and are not an talking terms with them.. its a very sad situation.
Regardless of the path a child chooses a parent must be accepting.
Especially if they are still shomrei tora mizvos!
It does not mean they are off THE derech.. they might be off YOUR derech.. but that does not mean they are not keeping mizvos.
parents have to realize this – I dont necessarily mean you, WOW-
and accept and love the child all the same- ‘Eilu v’eilu divrei elokim chaim’
WOW- if this rabbi cannot really help you.. or his yeshiva is not good for your son perhaps he can give you other names..