Take a deep breath. Give a sigh. Find sometihing to smile about.
Yours is not a matter for the courts.
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Do you need to file a lawsuit? People can sue over anything. It's your right. In Milwaukee there is even a small claims seminar in the courthouse where you'll get free advice on how to file a small claims complaint.
But, do you really want to spend the money to file the complaint, serve the complaint, attend hearings and then attempt to collect on a judgment?
I was told a few wise words when I first graduated from law school, "Principle is expensive." I'd recommend you stop shopping at this gas station instead of filing a suit.