iCloud Activation Lock - iPhones purchased at Police Auction

Hello,

I have purchased some iPhones with iCloud Activation Lock from a Police Auction.

I have proof of purchase from the auction house.

I have read on the Communities website that it is not possible to remove the lock as it is in place from the previous owner. However, I have read that some users have been successful in getting their iPhones reset by a Customer Support Manager.

I am just wondering has anyone recently been successful in removing the lock and if they would have any advice when it comes to dealing with Apple's Customer Support.

Thank you.