u/Cumazur33

I contacted a guy to replace my in wall all units, I tell the guy that is has its own dedicated 240v plug. It's a big unit and it cools the living room, kitchen with vaulted ceilings. The area is about 400-500 sq ft. He tells me as he's installing the AC that is significantly smaller 8000 BTU, that he couldn't find a 240v. I've been able to find some and still expects full payment. This is how he left it. I did not agree to this and he didn't let me know ahead of time. What would you do to correct this setup?