Setup Squarespace, Mailchimp, Acuity

I need someone to help with: -Setting up Squarespace, Mailchimp, and Acuity for my small business -The task involves fixing email addresses in Mailchimp and importing new ones. -I need help figuring out why some email contacts are being imported as non subscribed, even when they are clicking 'yes' to be subscribed. I also need someone that can fix custom code. -I need someone who is fluent in these 3 programs to help me fix issues bringing in contacts and subscribers from my squarespace website, acuity scheduling and organising them in mailchimp correctly. The ideal candidate should have experience in web design and email marketing tools to ensure a seamless setup and troubleshooting of existing systems.