I entered the parking garage 15 minutes early and ...

I entered the parking garage 15 minutes early and left the garage before noon on Sunday and was suppose to leave at 3 am on Monday. I got charged an extra $22 for entering early. This is rediculous you should be able to enter or exit to explore any time you would need to without being charged extra because you reserved your space for an allotted amount of time. When it comes to other people reserving the company would know how many spaces are available.