What should I do if a cable company does not respond to a wrong shipment?

Hi. Long story short, I ordered a pair speaker cables from this small company in Colorado called Audio Envy, got delayed twice, asked them to double check my shipping address twice, yet the manager did not listen and ship out to my old address. He re-directed the package on the last day of arrival but it seems like the re-direct attempt has failed as status is delivered in a parcel locker. He does not respond to my emails now. What should I do with this guy?