Recived a notice of data processing of my data from Cognism. Then what?

I received an e-mail from Cognism about a notice of my *data* processing in their service. I am not sure how they get my e-mail address (which is not related to my name or job) and relate it with my name. Anyhow, I did ctrl+f to see the `opt-out` section, and here is the section:

    > ## Marketing Opt-Out Options
    >
    > If you do not wish for your personal data to be used in the
    > Cognism Database for the purposes set out above, please fill in
    > your details here[0] or contact us using the above contact
    > details.
    >
    > Where you receive a marketing email from us, and you would like to
    > be removed from that mailing list please let us know by clicking
    > unsubscribe at the bottom of any marketing email that you receive
    > from us.
    >
    > [0]: https://www.cognism.com/data-opt-out

Normally, I looked at the page, and funnily enough to ask me to fill in the company name, first and last name, where I live, and my work e-mail to opt-out. Is this just normal form for this kind of opt-outs, even though I really didn't want to be part of their collected data? Do you have any suggestions on keeping me away from these services?