Transferring/uploading email addresses from Drive to Mail Chimp

What we want doing
- uploading email addresses from spreadsheets on our Google Drive to mail chimp
- there are approx 500 email addresses we think (should not be more than 700 emails)
- we will provide log in details for Google drive OR copy and paste emails onto excel and send
- we will provide log in details for mailchimp
- the email addresses need to be saved on our specific ‘prospect’ list on mail chimp

When we need it doing by
- within 48 hours; by Saturday 20th August 12pm UK time

Our expectations
- to have all email addresses currently saved on our Google Drive to be added to specific mail chimp prospect list
- if there are any duplicate emails then we expect only 1 of them to be added to the list