Not Equifax but here's a story about how another David once met his Goliath in Small Claims Court. I wish I could find an online citation to confirm the details :-(

In the 1970's, financial conglomerate Transamerica owned a credit card brand, Diners Club I think. An ordinary citizen had a dispute with Diners Club and was getting nowhere. He convinced a small-claims judge to place a lien on the Transamerica building in S.F. That got their attention real quick because they needed clear title to the real estate for some finance shuffling.