See Privacy Shield Annex 1 at https://www.privacyshield.gov/article?id=ANNEX-I-introduction

Alternatively, you can contact the data protection supervisory authority in your jurisdiction for assistance. (Note, Cisco’s main establishment in the EU is in the Netherlands. As such, our EU lead authority is the Dutch Autoritiet Persoonsgegevens https://autoriteitpersoonsgegevens.nl/en. Your California Privacy Rights
California Consumer Privacy Act (CCPA) / California Privacy Rights Act (CPRA)

For business purposes in the last twelve months, Cisco may have collected, used, and shared personal information about you as described in this privacy statement. Each category of data that may be used by Cisco or shared with third parties is categorically outlined in this Privacy Statement. California consumers have a right to: (1) request access, correction, and deletion of their personal information, (2) opt out of the sale of their personal information; and (3) not be discriminated against for exercising one of their California privacy rights.
How do I complain? 
you can contact the data protection supervisory authority in your jurisdiction for assistance. (Note, Cisco’s main establishment in the EU is in the Netherlands