It's a tough situation, but you may have come on a bit strong. By my count, you left 4 emails, once voice-mail, and had one conversation by phone in the span of less than 4 business days.

At this point, I don't think the relationship with that company is salvageable. I would try to move on. I assume you already turned down the other job offers? Depending on how you did it, you couldn't lose anything by emailing them again and letting them know you're still open to any opportunities that may be available.