hi mate i feel for you and know exactly what you are going though......teens are a nightmare think it must be there duty to think parents are always wrong .
If you have a nose at my threads you will see what I'm going though at the mo with my 15yrs old son but please don't let this put you off i know of plenty of expats with teens who love it ,one advise i will offer is don't do what we did and put a time scale on it , we did this and he held us to IT
Take care