What does your reciept say?

Does it say H22 swap with MTX conversion on it? If it does then tell them they can talk it out in court and you will win because the quote states the conversion as part of price paid.

If what you paid was only for parts and labor was to be added in later then you are kind of SOL and are going to have to work something out with them.

yes there is a bit more to doing an auto to manual swap and making it look clean, but 3k is steep. I would say maybe $1500 -2k at the very most and it better be tits up factory looking work at that price.