You may need to move into his warehouse. I got an NSF check from a company one time. Went down to their store, pulled up a chair and sat down right by the front door. Didn't say anything. When they asked if they could help me, I told them that we had unfinished business and held up the check. The manager called the boss and the waiting game began. I struck up a friendly conversation with every customer who came in. I never said anything about my problem, but the store's management didn't know that. After about 3 hours they asked me to leave. I pleasantly refused. When the sheriff's office showed up, they complained that I was loitering. I explained the situation and pointed out that my earlier purchase made me a "customer". Sheriff told the proprietor that as long as his business was open to the public and I wasn't causing any disturbance, he wasn't going to interfere. A few more phone calls and in less than an hour I had cash in hand and was on my way.

Sounds like your furniture guy has made a habit of doing this. You're just a voice on the phone now and he doesn't really care what you think. Time to turn the tables on him. I'm sure you and a couple of friends can find something comfortable @ Plush & Comfort warehouse while you wait for Mr. Carrol to come to his senses.