Hi.

Check in the file cutstyle/pixtheme/functions/index.php on line 61:

add_theme_support( 'woocommerce', array(
    'single_image_width'            => 600,
       'thumbnail_image_width'         => 400,
       'gallery_thumbnail_image_width' => 300,
   ) );

and use this setting for image proportions https://take.ms/AOhDx
Appearance -> Customize -> Woocommerce -> Product Image

If there’s a problem, give me site url and admin access.

Please, give me admin and ftp access.

Insert this code in the functions.php file.

add_action( 'woocommerce_before_single_product_summary', 'pixtheme_woo_single_item_container_open', 5);
function pixtheme_woo_single_item_container_open() {
    echo '<div class="pix-single-item-wrapper">';
};
add_action( 'woocommerce_after_single_product_summary', 'pixtheme_woo_single_item_container_close', 5);
function pixtheme_woo_single_item_container_close() {
    echo '</div>';
};