

GDPR infringements are categorized by severity and impact to its users, but also by the yearly turnover by said company. Meaning cookie banners by smaller companies are low priority.
You could try contacting the relevant Data Protection Authority from your country or the providers country.
Correct, if you want to live cookieless on the internet you have to disable them in browser. But as others have said, this will break the majority of websites.
Functional cookies can never be used for identifiable information, only to ensure the functionality of the website.