Returning equipment that Comcast Xfinity erroneously sent to me via FedEX

I have some equipment that I didn't order but was shipped to my address with the incorrect name.  I'd like to return it and the last time I was able to chat with a liver person, the person said that they scheduled a pickup trip with FedEX for this past Monday but they didn't show up.

Can someone help me get in touch with someone to get this return picked up?  If I don't get any help I will destroy the piece of equipment.