Yup, I called Panasonic first, they referred me to Woot. I received an email response from Woot Customer Service offering me a $20 refund, which in my case is fine - the replacement optical cable cost me $21.74 at Radio Shack, and I don’t care about the HDMI or RCA cables (well, I might want the HDMI cable some day, but it’s hard to imagine working my way through my inventory of RCA cables).
I concur, package absolutely looked new and unopened, and had shipping info from Panny to Woot (if I recall) and then on to UPS/me. It also had stickers or graphics on the box touting the cables - it just didn’t have any in the box.
If I get the partial refund, I’ll be fine with it, although overall you’ll still have shorted me an HDMI cable, RCA cables, and $1.74 
But I appreciate the responses both here and via CS email. No refund yet, but I assume it takes a few days to post to credit card.