Question: how to import contacts from excel to bluestacks whatsapp?
Answer: Paste the VCF file to C:ProgramDataBlueStacksUserDataSharedFolder, or whichever Windows drive you have chosen to store ProgramData in. ... 
Launch BlueStacks.
Click on the All Apps button.
Clicks on BlueStacks Setting icon (it will look like a gear).
Click Manage Contacts.