Katie,
I do not believe an one recovering from an addication would say it was easy. If it was easy then no one would be an addict right. Do not answer your phone next time he calls, he wants a reaction from you. I hope he will hit rock bottom.
My XAH is on Meth and has been in and out of rehab. Myself I am 2yrs clean from meth. It was easy for me because I had kids that I loved more then the drug.
So just let him hit his bottom, it maybe sooner then later.