How long should it take to get this refund..military?

I am a military spouse and we just recently moved into new housing b/c our old housing is set up for demo. This was a forced move and we had the option of moving ourselves and getting $1500 in lieu of our rent for the first month or they would pay movers to move our stuff for free. We chose to do the move yourself and get the money. I was just wondering how long it should take to get our $1500. They have ALREADY received our rent 15 days ago and our saying it will take 30 days to get our refund?? How can this be? On the paper they gave us it said payable within 30 days but when I call they say up to 45 days? It should only take a few days to process and mail the check!