I called immediately after I saw I wouldn't make the flight. One hour after the deadline. The reservation was canceled, it's juts the call was dropped when she transferred me to customer service to talk about the charge.

There hasn't been a charge, so I'm going to just hope there isn't. I'm a loyal Marriott customer but have never been to this particular hotel and probably won't in the position to stay there again - so the hotel certainly doesn't have any incentive to help me. Learning experience, I guess.