How long for a refund?

It's been 14 days since my return got delivered, and I haven't even gotten a confirmation from Dell that it was received or that a refund being sent. I'm now a week away from having to pay interest charges on something that has not been in my possesion for 17 days. Did I fall through the crack here, or is this normal for dell these days? I remember this taking less than a week a few years ago.