downrank own site without cpanel and ftp access

we have made a new page for a customer. Unfortunately, the old web design agency unreachable. we can not reach them absolutely. some say the company was insolvent. but the server still running.


Therefore we have created a new page for the client.


Now ranked the old page which we can no longer process still.


Is there a way to kill the old site complete from google ranking?


we have no access to the old page.


can anyone help?

Do you want to downrank the site? It's very simple using negative SEO. Just blast your own site with thousands of links with shitty quality content in a short time using any of the software out there, maybe GSA because it has lots of platforms so it's a bit easier for you to kill your own site.

Ok i will try to build much links with GSA. Thanks 4 helping.