If you didn't know the Captain involved will be in court in Denver on Monday morning 8:30 AM.
One of the ways this can be handled is to refuse to work with the CSR involved. If you find he is working your flight call zone and request he be replaced with another. However, don not make a scene and if refused wright an OPS report about it and then go fly your jet.
Personally the only time I had a conflict with a CSR I turned and walked away. I left the airplane and jetway until things cooled. The airplane won't fly without the pilot(s).
Hind sight is 20/20!