Delicate, he's not going to say that!!! One boundary violation and he gives you the boot? And a boundary that he's never stated and you didn't even know about???? If he doesn't accept texting, he needs to tell you that. But I know how miserable it can be waiting for a response, so please try not to agonize. He's on vacation, so he might be out on a river whitewater rafting, or underwater scuba diving, or doing something fun. He said you could call, so his INTENTION is that he'll respond to you when able. And I'm sure he will.