J710f frp not done

J710f DS FRP lock done by Z3x pro but actually not done.
I have flashed the set with old most firmware downloaded from support and then with combination file also but Frp lock is successfully removed but infact not done.
The sofware says that do a factory reset but we can not do a factory reset while frp lock.
Few days before I have done same model same version with Z3X but now i can not do why