It's been 2 months and you contacted her twice with no reply? That doesn't paint a very good picture - IMO. If she had been sick or otherwise indisposed, then that would be a different story - however since she didn't indicate that to you - it doesn't seem like that is her issue. You could always give it one more try - then I would consider it to be a case of "3 strikes and you're out"!


ETA: You could always TRY to get a response out of her by asking for a refund of your money for the unused time. Sometimes money speaks louder than words. Of course if she hasn't answered you so far, she probably wouldn't answer this either - - but it might be worth a TRY.