Thanks for using WP Socializer.
Could you please clarify the feature you are using ?
Is it “floating share bar” or “follow icons” ?
If “floating sharebar” then you can add a “custom html” social icon and insert whatever code you want to add a link.
If “follow icons” then you can insert any “follow icon” button, change its “profile url”, “icon image url” as needed for your custom link.