Hey CapoAyz the screenshot you shared shows that whoever logged into the account was approved through login verification.
This would mean that either you approved it or someone has compromised the device that you use to verify ownership.
I know it's frustrating, but based on that our team may have closed your case off. The best thing to do is gather as much info as possible and open a new case ensuring that you let them know that you did not approve any device other than yours.
I would also recommend looking at what device you use for verification and ensuring that no one else has access to .
Darko