He don’t have enough data to unlink the account and moreover the buyer is trusted. Previous name Country where the acc was created Date when the account was created Purchase receipt All these data are not easy to get,the account was created in Iran and the account is currently in a Iranian clan.
For you it will be easy to recover as you are from Iran,originally where the account was created so just contact supercell and provide them all the necessary information.
I sent it to Supercell and explained it to them on my Supercell site. We will wait to see what they do
@Support Fortunately, I was able to recover the account and register it on the Gmail that the buyer gave me. Please delete the negative feedback.
@Support The account was placed in the buyer's new personal Gmail. Which no one has access to. Buyer only