I am sorry to hear that you lost your footage! If you were previously on a trial that ended, that would be why. Most likely you had some sort of lapse in payment and it dropped. This happens. Here is a great link on how Nest Aware works and how to subscribe, and here is a link on how to manage your subscription.
Please let me know if you need further assistance.
We haven't heard any updates from you. I'll go ahead and lock this thread in 24 hours. If you're still in need of assistance, feel free to start a new thread and we'll be happy to help.