O where o where has my thousand dollars gone

So I upped my voluntary retirement contributions for February, and they were duly taken out of my paycheck. However, they didn't show up in my TIAA-CREF account. This is bad. They always arrive at the same time as my work's contribution and my involuntary contribution, but this time something seems to have gone amiss and I am missing $1000. I notified TIAA-CREF and they are looking into it, and I notified my HR department and did not get a response. Let's hope one of them finds something soon.. I'm a little disappointed that I missed the really low stock prices day - TIAA-CREF said that when they credit the money, it'll buy shares at whatever price is current that day, not the day it was supposed to credit. (Dangit.)