I have recently bought a iPhone 6s off eBay and it is icloud locked. How do I remove the icloud lock

I have recently bought a iPhone 6s off eBay and it is icloud locked. How do I remove the icloud lock - 1

You really can't. Request a refund from the seller or bring it up with Ebay if they aren't willing to work with you.

You got scammed.

Unfortunately you can't. Only way would be to get the asked for Apple ID & password. What you should be trying to do is get a refund through eBay because you were likely scammed here.