How Do I stop vendor calls after purchase or moving a new domain name

When I have added/purchased a new domain name I start getting calls asking me if I need help with setting up website or with SEO. I am a developer/designer with my own business, how do I stop these people or companies from calling me? Is there and button I can push or a check box? Or something I can purchase through Cloudflare to stop this?

This topic was automatically closed 15 days after the last reply. New replies are no longer allowed.