security logs ip change have all the details my friend. i alread said it the account is mostly used and created in the Netherlands if anyone have logic they can see that the accounts ip is now used by a weird country
People move around (and/or use VPN) so changed IP is not the proof enough that account changed hands. And most importantly, you don't have any solid proof that you are the original owner of that account.By the why, how come you waited for so long to report the hack?
I agree with you that changing ip with vpn can be a kind of drama but it seems to me that the account has been changed hands multiple times by the original owner.
Can't an account buyer pause for a week minus participating in any signature? 
Yes i hope with you that this is the right think account is change new hand or selling new person.