Covve doesn't currently support a direct import of contacts from a file. 

If you have a list of contacts in an Excel spreadsheet or a .CSV file that you want to add to Covve, you can import the file to the email account syncing with your device. 

The contacts will show up in your device's address book and will then, be synced into Covve.

See here for help on how to import contacts in your Contacts account