Woocommerce image size gallery thumbnails

Ok I am having problems with changing the size of my woocommerce gallery thumbnails, they should display 100 w x 120 h cropped and line up equally along side the main product pack shot image.

The thumbnail currently display 100 w x 100 and don’t line up with the bottom of the main product image.

I was given some code the below code to add to my functions.php file but the code did’t seem to have any effect on the thumbnail images.

add_filter( 'woocommerce_get_image_size_gallery_thumbnail', function( $size ) {
   return array(
       'width'  => 460,
       'height' => 460,
       'crop'   => 1,
   );
} );

add_theme_support( 'woocommerce', array(
   'gallery_thumbnail_image_width' => 460,
) );

Is there something wrong with the above code?
See this link as what I am trying to replicate, basically the thumbnail images are cropped and line up with the bottom of the main product image.

The page I need help with: [log in to see the link]