If the signage is an issue and it appears it is a building and safety issue, you need to contact the sign company in writing and explain that something needs to be done in less than 24 hours. If the sign is not placed elsewhere by this sign company, then you need to either contact your credit card company (if you paid by credit card) and file a dispute to reverse the charges or if you paid cash, contact the small claims court in your area and see if you can file a small claims action. You can also check with your state's attorney general and see if you can obtain a complaint form from that agency to file a complaint. Oftentimes a mediation by that agency may help resolve the problem.