Contact us and we will give you instructions on how to replace the non-conforming item.
For next time: if at the time of delivery, you notice signs of tampering, visible damage or any other type of anomaly (e.g. mismatch in the number of parcels), complain in writing to the delivery operator, putting the following wording on the accompanying document: "ACCEPTED WITH RESERVE FOR TRANSPORT DAMAGE" followed by a description of the anomaly found.