Bigin to Zoho: imported as Accounts and not as Leads

Bigin to Zoho: imported as Accounts and not as Leads

Hi, We are evaluating both Bigin and Zoho CRM and are currently on a free account to test the functionalities to see what best suits our needs.
Started with Bigin and added about 150 Companies and Contacts as prospects.
We then migrated that into Zoho CRM, but they all show up as Accounts and not as Leads. How can we correct this.
Thanks