In Australia you'd probably text. I prefer calls, but texting is pretty standard. There isn't a clear right and wrong action here, as how she reacts to it is specific to her, not the female gender in general. Some girls will prefer texts, some will prefer calls. She's unlikely to blow you off for doing one rather than the other. How decisive you are at following up is more important than how you follow up. The one no-no is leaving a voice mail. Better to text if she doesn't answer.
