Sold ticket before Covid restrictions that they would not refund in 2019. Kept it as travel credit. Bought new ticket with this credit for travel for May last year. It was a gruelling three airport layover trip that costed the credit plus about 150 usd additional. Going there was okay although already long to begin with considering the layovers. Then a week before traveling back, they told me flight was canceled and need rebooking. They had me on a flight itinerary that was longer by 10 hours with layover in an airport for almost 10 hours! I said I cannot have that because I have work next day. So they placed me on the shorter flight but I have to pay 1100 usd extra! I had no choice but to take the flight. The attendant over the phone suggested I file a complaint. I did then and it's been about eight months they didn't even bother to get back to me. United airlines is surely bagging for the race to the bottom award.