GDPR Rights

One of the fundamental GDPR rights is the right to be forgotten.

I recently received a cold call on my mobile number from a company that I had not given it to.
They had purchased it from Cognism.

Now Cognism are reasonable and have decent records (kind of they needed to be reminded that the initial daraset was incomplere) of where they have sold it to.
Their website has a simple form to remove me from their database,

The problem is now the companies they have shared my details with:

lead-forensics

zymplify

lightrun

revgen

ukfast

These all have gdpr compliant messages on their sites but don’t have a simple form to access them.