What options do I have as a Buyer when I ordered something and it is running late?

What options do I have as a Buyer when I ordered something and it is running late?

I posted a "Want to Buy" and a person accepted it, I ordered it and the time to complete the order was 2 days, he is already running late. And I don't get any communication from him. Can I cancel the order? And get back my money? How to do that?