Dear Maia, Why don't you get back on the phone and tell him that you posted your problem with his company on a quilting board that at last count had 23,625 members, (many of whom are members of quilting guilds and groups and will spread the word), and that the board had 7,652 posts in the last 24 hours. That's what it was just before I started to write this.
Further, say that your lawyer (somebody on this board must be a lawyer) suggested you email your post to his manager, the president of the company (these names are always available online), and the local Better Business Bureau, unless he reimburses you on Monday.
The threat may actually save you the work of actually doing all that!