It seems like you're hanging a lot of hope on a recovery attempt that he is not taking seriously. Instead of doing hard work to recover he is busy with his contraband phone pulling your puppet strings so he has someone else to bring him cigarettes and treats at rehab.
He is your ex. Your only tie to him is the fantasy relationship that you wish you could have with the man you hope he will become.
Keep taking care of you, keep up the Alanon meetings and be good to yourself. Contact with this guy= manipulation and pain. You deserve much better than you're trying to settle for with this guy.