(((hugs)))
The worst way to end therapy is by running out the door.... YOU deserve better than that. Make an appointment and return, if for no other reason than to tell him why you feel he betrayed you. Your overreaction makes me think that perhaps you feel everyone has done that to you...and his doing so was more than you felt you could handle.
It could be that your attachment has gone beyond the normal transference... but that could have been partly his doing too... you might be able to discuss this and see if it's fixable.
It could be that HE felt he was in over his head with you.... and needed to draw back some at this time.
It could be that something in his personal or professional life has caused him to make such changes... you have no idea what he's dealing with (and it would be unethical for him to dump on his patients).
It does hurt to lose your therapist (or feel like you have)... he can't contact you so you need to make the effort and recontact him through his service. (Good therapists that I know don't engage in email with their patients at all...so consider that you got a bonus for a while ).
Breathe. You're growing. It does hurt. You can work through this...but trust me that you need closure with this T, or you'll suffer for a long time... and there may be elements of an adult discussion that allows you both to begin again with a clean slate.