Change role on myCRED content purchase

/**
 * Promote Based on Content Purchase
 * Changes a users role based on their myCRED content purchases.
 * @version 1.0
 */
add_filter( 'mycred_add_finished', 'mycred_me_rolechange_buy_content', 99, 3 );
function mycred_me_rolechange_buy_content( $reply, $request, $mycred ) {

    // Only applicable if the user gained points for purchasing content
    if ( $reply === false || $request['ref'] != 'buy_content' ) return $reply;

    // Exclude admins
    if ( user_can( $request['user_id'], 'manage_options' ) ) return $reply;

    extract( $request );

    $new_role    = 'vip_role';
    $requirement = 9000;
    $user        = get_userdata( $user_id );

    global $wpdb;

    // How many points have the user spent on buying points?
    $total = $wpdb->get_var( $wpdb->prepare( "SELECT SUM( creds ) FROM {$mycred->log_table} WHERE ref = 'buy_content' AND user_id = %d AND ctype = %s;", $user_id, $type ) );

    // If no results are found, use the amount paid now
    if ( $total === NULL )
        $total = $amount;

    // Change users role if they have spent the required amount and do not yet have
    // the new role.
    if ( abs( $total ) >= $requirement && ! in_array( $new_role, $user->roles ) )
        wp_update_user( array(
            'ID'   => $user_id,
            'role' => $new_role
        ) );

    return $reply;
}