Two bags with sports equipment (wings and boards t...

Two bags with sports equipment (wings and boards to practice Kitesurf)
retired in Trapani to Padua, after 3 days. what is usually needed for this type of expedition comes only my son's bag ... mine stops strangely in Rome and is now lost ... these packages had to travel together and are 150 cm long. each and weigh about 42 kg. I would like to know how such a volume can be lost ..... The value of the content of each bag is approximately 5,000.00 euros.
Given the type of material, I insured the shipping for 2,500.00 euros and it seems that I will lose the difference. Never again and I will advise everyone not to use this carrier.