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What would be considered appropriate compensation for a nonfunctional shower?

Just checked out of a one night stay at a Hilton Garden Inn. When I woke up to take my shower this morning I turned the handle and nothing happened. Nary a drop of water came out of the spigot. I fiddled with it for a few minutes to no avail. I was in a hurry so I washed up as best I could with a washcloth (the sink worked fine), got dressed, packed, and went to the front desk to check out.

When I told the front desk worker about the problem, she offered to send a maintenance man to the room, but I declined because I needed to get on the road. I asked her if there was anything she could do for me and she offered to take $20 off the room. I told her because I'm on a business trip, discounting the room doesn't really benefit me and could I have points instead. She said that would be fine - she would leave a note for her manager to credit my account. She asked how many points I was looking for. What would your answer have been? My reply to her caused her to raise her eyebrows like I was asking for the moon, but I thought my request was fair. I asked for 12,500 points since that's half the value of the lowest standard reward. Did I ask for too much?