I'm sure you have probably done something by now, but I'm going to answer anyway...
I was gonna say to call or text him back. For the simple reason of don't do what you wouldn't want done to you.
Since he called on the break, like the other girl said. He can't decide that and expect you to come crawling back when HE decides to. Just like HE decided on the break. He is showing very selfish behavior. So considering that. I think it is totally justified if you continue to ignore him.
So your call. I'm sure you have done something by now, but in case you haven't, those are my two cents.