Deployment Order Address Change

I’m deploying. No problem. My orders were cut before I moved & the BAH difference is significant over 1k. My IPR is saying I can’t update my orders with my new address which would determine my BAH. The difference determines how my bills are covered while I’m away. Is there anyway I can get this changed? We’ve calculated the cost of cutting expenses & it helps little. We don’t come from a family where we could move back home to help save while I’m gone. Our finances are good with my civ job and our combined income. The deployment changes things.