Frankly, I don't think you have a leg to stand on, assuming the suspension sign could be read. It is mounted correctly on the sign for the bay, and is right by your car, so saying it was not seen or coould not be read is just not credible. Sorry if this isn't what you wanted to hear, but it is reality. The bay here is subdivided into individual bays, so it is possible that the suspension was for specific bays, but the sign is unreadable looking at the photo.