Had a bad experience last night at Aspen Airport. Flight was delayed because of an incoming aircraft delay. Notification was horrible, leading many people to go to the airport and wait for four hours. Fortunately I have a residence nearby and was able to go back to my house and wait there. There was, of course the expense of the Uber. Then got back to the airport around 945 pm and everything seemed good -we loaded on the plane and pulled away from the gate and then had to cancel because of lack of deicing equipment. I was automatically rebooked to this morning. That flight time changed suddenly a little after 7 am and then when I went on your app to rebook, it offered the option of choosing standby without losing your original confirmation. I went to do that, but was unable to do anything other than confirm a different flight. I did that, despite that not being my preference, and then was not assigned to a seat. When I went to choose seats, the first class seats which I had paid for in my previous flight were not available. No big deal. But when I went to choose an exit row seat, it wanted to charge me $69 more despite the fact that I had originally had a first class booking. I spoke to an agent via the text option and she was unable to help me! What’s the point of having a customer service agent if they can’t provide service to the customer? overall, United has some big issues and needs to understand that there has to be a focus on the customer.