I am in Canada and have many AquaLung products. I purchased them all in Canada either from an LDS or from a Canadian on-line retailer. I have had truly exceptional, fast, and hassle-free service from AquaLung Canada for parts and service, far beyond my expectations.
I would not expect that if I went south or overseas to bypass the established chain of distribution (grey market). The regional networks, and authorization of dealers exists for a reason.Without it, anyone could buy and sell anything anywhere. No manufacturer could manage that chaos. By circumventing the manufacturer's authorized system of distribution to save a few bucks you relinquish your right to the excellent service a registered product bought through an authorized dealer includes.
But I have been in business for a long time, and understand the rules.
In the OP's case here, the true culprit is the vendor who sold outside of his region, cheating his fellow dealers in other regions out of their entitlled share. The OP is certainly a victim, not of Aqualung, but of an unscrupulous vendor. A hard lesson to learn, and one not to forget.
I would hope that the vender gets taught a lesson too.