As a business owner, Facebook had more data on your business than you do. The Facebook apps were sending everything from phone locations, GPS coordinates, picture meta-data etc. That makes me think, I wonder if you can get a good enough attorney and demand that Facebook turn over all the data it has on your business?
That's not entirely accurate. Facebook has more data useful to them on any given business than the business owner. They have a set of categories that you may or may not fit into. They have a geolocation probably. They have a list of check-ins. They have any user-submitted photos (which become check-ins). However, the actual amount of useful data catalogued by Facebook is paltry; their basic approach is "pssst - you checked in at this place, tell us everything you know about it!" which gives them an "ask random strangers in the crowd"-level intelligence. More than that, the business owner has to tell Facebook. The categories they auto-propagate when you purchase advertising is pathetic. Facebook is not an intelligent agent. It's a big messy blob of uncollated, uncorrelated factoids.