keep calling until you get the answer you want. Demand to speak to a supervisor. Its not right they are doing this.

I had a date of 5/1 that I needed mine. Nothing.
Called Monday & they asked when I needed them by.
Uhhh...5/1, geniuses.
I told them the absolutely latest I could get them was this Friday.
I got a shipment today with 11 costumes missing.
What part of ABSOLUTE LATEST did they not understand?

(I don't really need them for another week, but you have to lie to get them when you really need them.)