I would definately call twice a week until 5/20.  Keep on them.  They ended up overnighting 1/2 of our order, but that doesn't do a lot of good.  You can not give a costume to 1/2 of the four year olds and not the other ones, or what good is the feather headpiece if you do have the costume.  THey said they would overnight the rest of them today, so we will see if we receive them MOnday or not.  But they said they would call back with a tracking number and never did.  We had to reschedule ten classes worth of pictures and it is Thursday.  We will not be using them next year which is ashame, it is the only company we have used every year since we have been open.