Data Transfer - Obtaining Contacts and Accounts from another Zoho Account/Admin Owner, Not a User of ours.

Data Transfer - Obtaining Contacts and Accounts from another Zoho Account/Admin Owner, Not a User of ours.

Hello! We recently bought the Assets from another company and the agreement included the entire Zoho CRM built by the seller. This include all Accounts, Contacts, Details, etc. How do we obtain that information from his (the seller's) account and then remove his access from what we've obtained? Thanks!