I was watching an English class on Youtube (I'm still learning English), and I learned this saying: "Cheap works out expensive" I think it fits what happened to you. However, I think this shouldn't be like this, because they must give what they offer, and it it completelly ilegal. I guess in the US you can can sue the owner of the establishment.
I live in Venezuela and this is everyday fare. Because of the crisis, there are not many competitors and people basically do what they want, and the worst thing is they can't be replaced for another service, because there are just a few and no one wants to open new companies.
Sorry you had a bad experience, cheap things are a double-edged weapon, they can either be good or be very bad.
Good luck!