iCloud Activation Lock issue on a brand new iPhone
I purchased an iphone that was sold to a shop that was never used and in totally brand new condition. The previous owner began the setup with the iCloud only, never verified the email address nor completed any other setup steps or updates. Including never got a carrier or carrier plan. The phone is still in the box with all none used accessories or apps, no biometrics, etc. According to the store, the seller stated he did not remember his password and did not want the phone and was the reason for selling it. How do I get this Activation Lock removed. My request was denied even after submitting receipt. scenario, the store details, and all questions asked. They did not request my id but requesting an invoice or carrier contract, Are they not understanding that the previous owner has to have the invoice and that the phone was never set up for use or carrier? I need to my next steps, because it appears they are not trying to even understand this situation or find out the information and documentation easily instead of myself. The email address and where and who purchased the phone should be accessible. This is technology. I need Apple support Management for this I feel. Please advise
[Re-Titled by Moderator]
iPhone XR, iOS 12