This is a community forum where most of the replies are from other community members (customers). Since it sounds like you have some complications, perhaps you could try the "Contact us" option under "Nest Aware Premier Care" on the page below to "Get 24/7 access to Nest Aware Experts on the Nest Customer Care team. They’re available to answer questions, help you access features, and manage your subscription."
Sorry to hear you're experiencing this, I would love to look into this for you. Is it possible that there was an issue with a payment method, or anything like that? If the subscription was canceled, you could lose that footage. I am glad to see that you upgraded to Nest Aware Plus, have you tried to check to make sure that it is now working for you?