Funny enough he said not to tell everyone. So I will kind of not say anything lol..
This means youre in the driving seat. I'd go as far as to ask for a replacement for your guitar (something of equal or greater value) if yours is worth much, if not, something around the price of the cort or that price off of another one.
If they get arsey or are unreasonable, id nicely remind them that word of mouth is a very powerful thing. not only in person but on internet forums as this one.
I'm pretty sure 99% of people on here would think twice about getting work done there if they knew what happened with you and then they got unreasonable about rectifying the situation.