HELP!!!!

Sorry to post so many Q's but I honestly feel this is the only place I get real answers! I have a build-up line for March. I'm trying to drop/swap duties for this Sat. Of course IOCC won't let me do jack, so I've been e-mailing back and fourth with triptrades for the last two days. We are not understanding each other, so I finally call scheduling today only to have the guy I talked to get super frustrated that I was wasting his time via phone call and finally yelled at me to e-mail triptrades before hanging up. The problem, that I was trying to explain, is that my responses from triptrades are a minimum 12 but usually 24hrs and in order for me to make my currently schedule duty for Sat. I'd have to get on a flight tomorrow morning. So, is there any other way to handle this, or do I basically just have to accept that this is the system I now work for and get on a plane in the morning only to get an e-mail when I land that its been taken care of?