Good evening all,

I searched this forum unsuccessfully for my situation. I have a trip booked for UA business class SFO-BOS rt originally booked non-stop but with a schedule change booked SFO-EWR-BOS-SFO for Thanksgiving week. I originally booked lie flat business class SFO-BOS rt but with a schedule change I was rebooked via EWR lie flat and the return was a non-stop 737. I agreed with the changes at the time of the schedule change. Today I was on the United app checking out different options for my return flight to allowed me more time with my family. I chose a return flight that involved a connection but still kept me in first class. The cost for the change was $139 to change the return flight to the following day. On the app I agreed to the additional charge and selected my seats on my new return flight and selected purchase. I got a message that "not all seats are available for all flights" which made me concerned. I logged on to my United account to view my flights. I saw that my return flights were changes as expected but my First class seats SFO-EWR-BOS were gone and I was rebooked in economy. I called the Premier desk and spoke with an agent who told me that I needed to pay an additional $450 to get in first class SFO-BOS via EWR. I told her that I had paid for first class when I purchased my ticket and she told me that I had purchased a coach fare and needed to pay the difference to get in business. I told her that I disagreed and wanted to undo the transaction, and she advised me that she could undo the transaction including refunding the change fee. I told her that I wanted to do that and she restored my reservation with help from her "supervisor." After I had my itinterary restored, I asked her how could I have avoided this and she advised me that if I were to call instead of using the app, they could have preserved the original outbound flight where the app reprices the entire itinerary.

I'm irritated for many reasons but especially that the agent told me that I purchased a coach ticket. When I booked it online I only saw that my outbound flight was booked in P and the return in Z. At no point was I told it was a coach fare that was booked into business due to "buckets." I only saw a discount business ticket and not a coach upgraded ticket. Also, after the agent restored my original flights, couldn't she have changed my return flight for the $139 change fee without losing my outbound first class seats?