I am not with Laminar Research; just a flight simmer.
Because X-plane 10 is now an out-of-date version, but still supported, it can be purchased from the developers Laminar Research. The purchase methodology can be found by starting here at https://www.x-plane.com/cart/ If you are having difficulty contact Laminar research at email@example.com
I am not aware of the package you have purchased (or been sold) and would suggest asking for a refund from the seller.
If successful purchase X-Plane 11 from the developers at https://www.x-plane.com/desktop/buy-it/
Good luck and welcome to X-Plane.