The scammers deceived me

If the "papers" include the receipt from Apple, Apple can completely reset a device if a person can provide sufficient evidence of valid ownership. Do this online at: Activation Lock support request - https://al-support.apple.com/#/additional-support Apple says, "Proof of ownership documentation is required," but does not detail what currently constitutes proof. Prior to this new online service Apple typically required the original receipt issued by Apple or an Apple Authorized Reseller and documented provenance (so typically it would be the original owner who does this, or a descendant with legal proof of ownership). This will give you access to the device but won't restore access to the account used to lock it. There is nothing that can be done to expedite an Activation Lock request.

Apple recommends you "Keep your receipt after you buy an Apple device" --> Keep your receipt after you buy an Apple device - Apple Support

Unfortunately by letting the scammers sign in you essentially gifted the device to them. The "owner" is the person who is signed in unless you can provide to Apple's satisfaction that you are the true owner of the device. As I said earlier, that might require something such as the original receipt. Apple doesn't specify online exactly what they might accept (I can't get beyond the first page without filing for the service myself) so I suggest you try working your way through it.