Trailer wiring harness

This business is now in Stevensville (same phone number) and named "M&M Auto&Welding Trailer Sales"; his demeanor is still as poor, and for some one who claims "I've been in business 26 years, and I know what I'm doing", he couldn't even fix a simple wiring harness on my "throw away trailer" (his words ~ who says this to a customer bringing money?!). He said he could fix it, even volunteered to do more than I asked, and I was okay with that, and a month later he hadn't even touched the trailer. He told me he wouldn't work on it and to come get it. He cussed me out and told me to take my business elsewhere.