Shipping class priority & hide normal delivery (free shipping reached)

Good morning,

I have a question about shipping. At the moment I have some products that have a free shipping class and some that have a paid shipping class. I have 3 shipping solutions in parrallel: 1 by post (Bpost), 1 with Mondial Relay and 1 free post delivery for a minimum purchase amount.

I have 2 questions:

- When I have 2 products with 2 different shipping classes in my cart (1 free shipping class and the other with paid shipping class), I would like to be able to apply automatically the free shipping class first so with this no shipping costs will be calculated.

- When the minimum basket is reached for free delivery, I would like to hide with php code the "by post Bpost" option only, not hidding the Mondial Relay option as I want to let the choice to the client even it's free to select by post or by Mondial relay. I found this php code but it hides all the options even Mondial Relay, how can I hide only "by post Bpost"?

// Hide all shipping rates when free shipping is available, but keep "Local pickup" method

add_filter( 'woocommerce_package_rates', 'wpsh_hide_if_free', 100 );

function wpsh_hide_if_free($rates) {

$free = $local = array();

foreach ( $rates as $rate_id => $rate ) {

if ( 'free_shipping' === $rate->method_id ) {

$free[ $rate_id ] = $rate;

} elseif ( 'local_pickup' === $rate->method_id ) {

$local[ $rate_id ] = $rate;

}

}

return ! empty( $free ) ? array_merge( $free, $local ) : $rates;

}