Price Gouging at its Finest.. I would like to know...

Price Gouging at its Finest.. I would like to know why it is legal to charge someone for services they do not get! Imagine going into a department store and buying a shirt and being also charged for a pair of pants. Yo say, "But I did not get any pants,." They say well, we charge for pants whether you get any or not because we also have pants in the store."
Marriott, but I did not use your Resort for services, I had a business meeting and we did not use surfboards. Well, we charge you for the surfboard anyway.