How to update ranking and points for players in MySQLi when uploading new cvs file

As the title says. I have a website with table showing ranks of poker tournaments, I have created a db where I uploaded a csv file with the last tournamet. It´s works great.

But i can´t figure out have to update point and rank, when uploading a new csv. If player one has 6 points and the in the new cvs file the same player has 4 points, i want it to add the new 4 point to the 6 from the last tournament. And then update the rank position.

Thanks in advance.

Code:

<?php
// include mysql database configuration file
include_once 'db.php';
 
if (isset($_POST['submit']))
{
 
    // Allowed mime types
    $fileMimes = array(
        'text/x-comma-separated-values',
        'text/comma-separated-values',
        'application/octet-stream',
        'application/vnd.ms-excel',
        'application/x-csv',
        'text/x-csv',
        'text/csv',
        'application/csv',
        'application/excel',
        'application/vnd.msexcel',
        'text/plain'
    );
 
    // Validate whether selected file is a CSV file
    if (!empty($_FILES['file']['name']) && in_array($_FILES['file']['type'], $fileMimes))
    {
 
            // Open uploaded CSV file with read-only mode
            $csvFile = fopen($_FILES['file']['tmp_name'], 'r');
 
            // Skip the first line
            fgetcsv($csvFile);
 
            // Parse data from CSV file line by line
             // Parse data from CSV file line by line
            while (($getData = fgetcsv($csvFile, 10000, ",")) !== FALSE)
            {
                // Get row data
                $rank = $getData[0];
                $name = $getData[1];
                $points = $getData[2];
 
                // If user already exists in the database with the same name
                $query = "SELECT id FROM ranking WHERE name = '" . $getData[1] . "'";
 
                $check = mysqli_query($conn, $query);
 
                if ($check->num_rows > 2)
                {
                    mysqli_query($conn, "UPDATE ranking SET  rank = '" . $rank . "', name = '" . $name . "', points'" . $points . "'");
                }
                else
                {
                     mysqli_query($conn, "INSERT INTO ranking (rank, name, points) VALUES ('" . $rank . "', '" . $name . "', '" . $points . "')");

                }
            }
 
            // Close opened CSV file
            fclose($csvFile);
 
            header("Location: ../leaderboard.php");
        
    }
    else
    {
        echo "Please select valid file";
    }
}