Provide a complete description of your items (measurements, nature of goods), correct timelines (dates & times) and accurate pick-up and delivery addresses. Submit the transport request at least a few days before the shipment needs to be picked-up. By doing that, the carriers will have more time to plan their routes and check their truck capacities. This way you will also increase your chances of getting more transport offers.
Note: We will use reasonable efforts to keep the time windows requested, however best is to ensure that the pick-up and delivery sites operate normally during the times selected by you.