Mail chimp and folk integration through zapier

Hi - I need someone who can move to the next level of integration between my CRM and mail chimp using zapier. Currently my Folk database (CRM) is linked to my mail chimp account, when I add a tag in Folk the contact is added with the same tag into mail chimp. It's working fine. Now I need to add some more functionality:
1. To go the other way around, so if someone unsubscribes from mail chimp I need the tag to be removed in Folk
2. If the tag is removed in Folk - I need them to be removed from Mailchimp mailing list