Hi there.

This makes my blood boil and I'm offering to cover expenses for small claims court up to $800

On the condition expenses are repaid + an extra 100 bucks.
This will give you incentive to start the Small Claims Court Suit, (and I'm sure reddit will help you for the process)

Since you have such hard evidince, I see this as a somewhat risk free investment.
You take the cash, sue the piss out of this entitles pisspot, pay me the 800 (or whatever sum was used under 800 USD) + an extra 100 from your winnings.
I make an extra $100, you get paid.

We can sign a contract and get started if you are interested in this arrangment to get you the money you deserve.