In this country the attendant is the agent of the owner, acting with the power of the owner and that verbal agreement would be a binding contract. It would most definitley be the station owners problem and the car owner would be adjuged his money back at the owners expense. This would be done in what we call the small claims court or disputes tribunal and the petitioner would bring the station owner into the court. The station owner has to defend himself and cannot hire or ask anyone else to attend with or for him.
Appologise be buggered, the station owner is a horses butt.