Display string in front of the Shipping label on checkout page (instead of shipping integer value)

Question

I want a WooCommerce hook that can help to add string Contact for shipping quotes in front of Shipping Lable, by removing the shipping price on the checkout page. I'm developing a plugin and want to modify the shipping value.

I've tried many hooks. I tried to pass string to the following code, but it takes float/int value only.

WC()->cart->add_fee("Shipping", (float) $amount);

Answer 1

I have found a hook, that allows me to change/replace the Shipping value with string. I struggle for it many days:

This is the filter Hook:

add_filter( 'woocommerce_cart_totals_fee_html', 'custom_shipping_fee_html', 10, 2 );

And Function is:

function custom_shipping_fee_html( $fee_html, $fee ) {
// Check if the fee label is "Shipping"
    if ( $fee->name === 'Shipping' ) {
        $fee_html = esc_html__( 'Item unavailable for shipping, please contact us to get a shipping quote', 'woocommerce' );
    }
    return $fee_html;
}