FlixBus Poor-quality And Unsatisfactory Service

I purchased my ticket for the 3 April 2026 Oslo–Copenhagen trip via the Flixbus mobile app. I have always been able to travel on Flixbus buses with enough legroom, but on this journey a bus from another company was used as part of a partnership, and the seating conditions were completely different from what I was expecting. On this bus, my legs do not fit properly in the seat and I cannot sit upright in a normal position. I am tall, but on regular Flixbus vehicles I can sit without a problem, so this situation is clearly due to the different vehicle and seat layout. There was no prior information in the booking process that a partner company with much more limited legroom would operate the trip. As a result, I have to endure about seven hours of serious discomfort on the section of the journey up to Jönköping. I have tried to resolve the issue but I cannot reach Flixbus customer service, so I am writing this complaint. I request either a full refund for this ticket or, at the very least, an official written apology for the conditions I have been subjected to during this trip. I also ask that you clearly inform passengers in advance when a partner bus with significantly different seat and legroom standards will be used, so that customers can make an informed decision.