you need to be talking to videohive because we have no idea what you're missing or what you bought.
Also, please do not double post.
Thanks for the advice and I'll make sure not to rush and click twice next time.
It's likely that you just need to relink things. Often, template makers include pre-rendered elements, but the file path to those pre-rendered elements is different on your machine. Simply double-click on one of the missing footage items in the project panel and point AE to the correct file on your machine. It may find all of the other missing files by itself at that point.