You should contact any corporate customer service associated with the hotel if available. You can generally find that information on the hotel website or online. In addition, you can file a complaint with the Better Business Bureau as well as any of the many online websites that provide service ratings for business in the travel industry such as Expedia, Google and Yelp.
No, not unless there was some breach of contract, and you could prove actual damages. The need to take a shower won't do that for you, I'm afraid, and the hotel can eject you at any time it feels you have created a disturbance. I would seek a pro rata refund and avoid that establishment. They seemingly don't want your business.
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