I'm sorry that there's a sort of urgency going on and you need him to call back and he can''t do it! That's rough. But, I wouldn't jump to the conclusion that he doesn't care, or is ignoring you call. I've talked to my T before where she's called at the very end of the day saying she didn't get much of a break anywhere, even during lunch people were constantly on the phone or others in the building would come in, etc. Have faith he will call back! I know it's hard, but give him the benefit of the doubt!