How to set different minimum order amounts based on delivery date (weekday vs weekend) in WooCommerce?

I’m using WooCommerce for a restaurant website and PiWebsolution to select the delivery day. I’m having trouble setting up different minimum order prices based on whether the delivery date is on a weekday or weekend.

Here’s what I need:

• If the customer selects a delivery date on a weekday, the order must be over $130. If the order is less than $130, the checkout form should show an error, and the submit button will be disabled.

• If the customer selects a delivery date on the weekend, the order must be over $200. If the order is less than $200, the checkout form should show an error, and the submit button will be disabled.

Can anyone help me achieve this?

Code I’m currently using:

add_action( 'woocommerce_check_cart_items', 'required_min_cart_subtotal_amount_based_on_delivery_day' );
function required_min_cart_subtotal_amount_based_on_delivery_day() {
    // Set different minimum amounts for weekdays and weekends
    $weekday_minimum = 130; // Minimum amount for weekdays
    $weekend_minimum = 200; // Minimum amount for weekends

    // Get the delivery date from the 'pi_delivery_date' field
    if ( isset( $_POST['pi_delivery_date'] ) ) {
        $delivery_date = sanitize_text_field( $_POST['pi_delivery_date'] ); // Get the delivery date from POST

        // Check if the delivery date exists
        if ( $delivery_date ) {
            // Convert the delivery date to day of the week
            $delivery_day = date( 'w', strtotime( $delivery_date ) );

            // Check the delivery day and assign the corresponding minimum amount
            $minimum_amount = ( $delivery_day == 0 || $delivery_day == 6 ) ? $weekend_minimum : $weekday_minimum;

            // Get the cart subtotal (before tax and shipping)
            $cart_subtotal = WC()->cart->subtotal;

            // Add error notice if the total is less than the minimum amount
            if ( $cart_subtotal < $minimum_amount ) {
                // Display error notice
                wc_add_notice(
                    sprintf(
                        __(
                            '<strong>A minimum total purchase amount of %s is required for the selected delivery day.</strong>',
                            'woocommerce'
                        ),
                        wc_price( $minimum_amount )
                    ),
                    'error'
                );
            }
        } else {
            // If there is no delivery date, display an error message asking the user to select one
            wc_add_notice( __( 'Please select a delivery date.', 'woocommerce' ), 'error' );
        }
    }
}

Issue:
The code works fine for weekdays.
When I select weekends and try to order below $200 (specifically under $150), I get the error message: “A minimum total purchase amount of $150.00 is required for the selected delivery day.”
However, when I order between $150 and $200 (for example, $170), no error is shown, and I’m able to proceed with the order.
Can anyone explain why this happens and how to fix it please?