Do you think I got screwed, or is it just part of the hobby?

have you called them back yet to discuss? Seems odd to me that a couple months have passed and you haven't pursued that route.

Stop touching the engine - leave it alone. Call them to see what you need to do. No point in asking us - they're the ones to be dealing with.

Good luck, but I caution you - CALL THEM before you even remove the valve covers.