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.