I mean this in the nicest way possible: have a backbone. Ur days off were approved months ago and you have proof of that so it’s not your responsibility to cover for their mistake. Tell them you can’t work those days as you’ve already purchased non-refundable tickets since your time off was approved 2 months ago
I did, I told them the request was approved in April but I didn’t even know she asked off until the schedule was released and my manager told me, my coworker didn’t even mention it so I was blindsided. We worked something out so that I do get some days off but I was supposed to leave on a Thursday and now I have to work that Friday and Saturday and I’m upset that I did things the right way in advance and somehow still this happened