You're overthinking this. Post a negative review or at least tell us who it is. Why? Because:

1) They forgot about you anyway 30 seconds after you left. That's literally why we pay them.
2) If you have cash, you can see them again (unless you're dangerous, etc then all bets are off).
3) There are way too many hot options around here to worry about what a shitty provider thinks of you.
4) You have 2 weeks on the board and 5 posts. You have no 'name' to protect.

- dave