What payment method, seems like an easy dispute if credit card.
I had an experience with a vendor that repairs instrument clusters, he told me he didn't accept cards, too much hassle.
My spidey sense tingled, and I went against my gut, and I soon found out why he didn't take credit cards.
He totally screwed me over and I had to pay to get it fixed a 2nd time elsewhere.

And just like what you described, guy called me and totally went off unhinged. My buddies still rib me about that voicemail.