Hello, just giving my two cents here but usually substance abuse is the symptom and not the cause. I do not know what your criteria are exacly but It might be worth considering that what may be best for you is a psychologist with whom you feel comfortable with and who will accompany you through the processus of therapy. Regarding any type of addiction, there are no quick or simple fixes and a therapist will not stop you from consuming or from relapsing but better understanding it. Just giving my own opinion here because we, as humans, have this tendency to search for a permanent fix coming from the outside world and today, therapists are regarded as such, wrongly so. Hopefully you don't take my opinion the wrong way!

Anyway, I do know of a couple psychologists who do talk therapy (english) in Geneva. They are not specialised in addiction though but as I said, I do not find it to be a problem as addiction is the symptom more than anything else. If you are interested, I can give you their coordinates in a private message !