I'm not sure that a customer would need to have all that patience, while Lamnia has the post investigate. It's all between Lamnia and that 3rd party, it shouldn't concern the customer. He paid for something, until he gets his hands on the package, the deal is not completed imo.
Retailers should, from time to time, eat a potential loss, and offer the buyer better protection. I see no reason why Lamnia would need to be reimbursed first by the post, to then take care of the guy. I know it sucks, but by going the distance, they would retain a customer and gain good PR. As it stands, I'd have second thoughts ordering from them.