Carbone Smolan Agency Stolen my logo

hi
this identity was stolen from one my old works!! *Unused proposal
Unfortunately, this is illegal and I reach out to the designer and he ignored my messages.
So, kindly help me protect my design copyright.

https://logopond.com/jozoor/showcase/detail/285242
https://www.underconsideration.com/brandnew/archives/new_logo_and_identity_for_seyfarth_by_carbone_smolan_agency.php

please share