I needed a couple of templates for 2 different projects so I searched the marketplace and ended up buying the first one but having installed it, I found I had to purchase some of the objects used in it because the license for them is extra to the cost of the template. 

I began buying them and got a pop-up window informing me how to activate them but also telling me I would receive an email confirmation of my purchase. Because of that, which is far more useful to me, I simply closed the windows. That was at least an hour ago and I still have not received any email confirmations. I need them as proof that I did purchase the licenses.

Also, once purchased, can the objects be used across an infinite number of projects or only a single project?