Unresponsive support?

Ordered a desk through Amazon Canada December 1st. Got a fedex tracking number, the top piece of the desk was delivered relatively quick on December 4th. But no legs have been shipped.

Amazon shows as order being completed but I still haven’t received the legs. I called flexispot support and was told someone would call me back, no one has.

Contacted them through Amazon and still no one has contacted me back. I am just trying to find out if the legs have their own tracking label or fedex forgot to drop them off the first time.

Anyone have any suggestions?