My question involves a consumer law issue in the State of: Florida

My husband and I attended a hearing today in Tampa. We parked in a surface lot, having both obtained receipts from the machine installed there. Driving through the parking lot (like a vulture on a carcass) was a representative from the towing company on contract with the property owner. My husband asked the driver, should I place the receipt in the back window here where it's easy to see (the car was parked normally, facing another car). The driver said that it was fine to place the receipt there. When we left court, the car had been towed because "the receipt was not improperly displayed." The sign indicating where to place the receipt said "dashboard," it did not say front or back. The receipt was visible from 20 feet away. Even though it was clearly visible and the driver SAW my husband place the ticket in the car, our car was towed. We believe that the trucks were 'cruising' for tows and deliberately misled my husband. We were charged $100 to get the car, despite a legitimate tag placed in the car where it was clearly visible. Our questions are: (1) are we in a position for legal action and (2) what authority governs this issue?