I met a girl on a blind date, and now I can't answer the phone or send text messages. I don't know what to do.

You are now faced with two situations. First, the girl is not satisfied with you, so you call him and let her have nothing to say. Second, she is thinking about your relationship. At the moment you called her, she didn't give you a definite answer. Maybe she really didn't get your phone call or text message (the probability is too small). I suggest you wait a few days and don't always call and send messages to her. You can let the matchmaker know about it properly, and maybe you can get her information without it!