| San Francisco to San Antonio. I have never know a company that has shot themselves in the foot more consistently than United Airlines when it comes to customer service. My latest experience with United Airlines has pushed my husband and me over the limit. We will no longer be traveling United. The last several times we have booked tickets through United, we have selected our seat assignment, and every every time, United has moved us from our original seats. We have tried changing our seats back on line, with an agent over the phone, and with an agent in person. I am always given an excuse as to why our seats have been changed and why they can not be changed back. Today’s flight was the same, our seats were moved, only this time, my husband and I were seperated. I spoke with an agent who could not help me. I asked to be transferred to a supervisor. A supervisor was extremely rude. She was defensive and condescending before she even tried to help. Finally, I was able to explain my situation. She told me the UA website clearly states seat assignments are not gaurenteed. I suggested that choosing seats should be removed from the site. Her answer was, “No that won’t happen, the site says there is no guarantee. Your seat was changed and I can’t change it back.” I asked to speak to her supervisor. Her response, “No, you may not speak to anyone else.” I asked for her name; she refused to give me her last name. I told her I understood that and asked for her employee ID number. She refused to provide any kind of identification. I asked her where her office was located. All should would tell me is that she was in Houston. I am aware that complaining about seating arrangements in first class sounds trite and normally would not warrant a complaint what is most frustrating and unacceptable, is how I was treated by this agent. My husband and I are premeier Silver member who will now be taking our frequent business to other airlines.