Illustrator for macOS High Sierra versión 10.13.6

please help me to get adobe illustator for macos sirrea 10.13.6

You can run version 2020 on that system: https://helpx.adobe.com/illustrator/system-requirements/earlier-versions.html

I have a Mac still running High Sierra and use Illustrator 2020, which I believe is the most recent compatible version.

You can contact support and explain your situation and see if they will provide links.