Connecting Calendly with Smarsheet and Mailchimp

I Just need to update a smartsheet candidates sheet after I get a meeting in calendly with that candidate, updating statud and date in the sheet. And at the same time update a tag in mailchimp contact list to know that candidate have a pending interview. Once the interview date ocurrs update the mailchimp status when I change the status in Smarsheet control sheet. I would like be made with Make better than zapier or otheer tools no so expensive as Zapier.