Write a letter. If calling doesn't help resolve a dispute with a vendor, sit down and calmly write a letter describing the problem and suggesting a reasonable solution. Carefully document and refer to any previous communications, using names and dates, and send it, certified, to the president of the offending organization. For extra clout, send copies to the BBB and the attorney general's office in the company's state. Spread the word.
Some resources also have consumer advocates who can assist in resolving problems with vendors.
Know the risks of online auctions. The deals can be tempting, but both the FBI and the Federal Trade Commission report a steady increase in Internet auction fraud since 1998. While some sites offer insurance and other limited protections, most claim to be only a meeting place for buyers and sellers and accept no liability if a deal goes sour. Use an escrow service. If you decide to make a big purchase from an auction site, consider using an escrow service.