foreach $item (keys %Myhash){
    if ($item eq $My_Value)    {
        
        foreach $iteminitem (sort(keys %{$Myhash{$item}})){
            foreach $iteminitem1 (sort(keys %{$Myhash{$item}{$iteminitem}})){
                if(
                    $iteminitem1 eq 'name' 
                        &&
                    $user_number == $Myhash{$item}{$iteminitem}{$iteminitem1}
                ) {
                    my $User = $iteminitem; 
                }
            }
        }

    }
}