I am not with Laminar Research; just a flight simmer from downunder.
You need to contact Laminar Research direct with your purchase problem at email@example.com as this forum is only for problems with the software.
However, having given you the above advice be aware that Laminar does not sell 3rd party add-on aircraft. They only sell the x-plane software. You may need to contact the Apple store or the site you are trying to purchase from as an alternative.