I checked the ACAA and they're required to give us bulkhead because I have an immobilized leg but they refuse to because people already chose those seats (even though I called months ago and was told I could have bulkhead). So now we're in the middle of the airplane and I'm not even sure I can get through the narrow aisle on crutches. Plus I have to have enough room to keep my leg straight, which I won't have with a regular seat. I can bend my knee for short periods of time (like 15/20 mins tops) but if I leave it bent for a 2.5 hr flight it will dislocate. Any ideas?