jQuery(function ($) {
    var content = $(".woocommerce-order-data__meta.order_number").html();
    if (content) {
        var searchTerm = "Bookeey Payment";
        if (content.indexOf(searchTerm) >= 0) {
            var elemId        = $("input[value='payment_type']").attr("id");
            var paymentElemId = elemId.replace("key", "value");
            var paymentType   = $("#" + paymentElemId).html();
            if (paymentType) {
                var newContent = content.replace(searchTerm, searchTerm + " (" + paymentType + ")");
                $(".woocommerce-order-data__meta.order_number").html(newContent);     
            } 
        }
    }
});