unapproved request

Hello! So I took off weeks in advanced for the Fourth of July week and they still put me on schedule? Like I have a plane ticket and I can’t refund it I have to go on my vacation but they scheduled me during the week three days when I can’t. No one will cover for me on Fourth of July 6-10:30 pm...

I am going to Germany for three weeks. A month in advance I tried asking it off as usual. When I did, it told me it was too long of a time frame and I should consider an LOA. A GSA happened to be standing right there so I asked her if that's what I should do. She told me that I could break it up...