Ring Protect Plan switch from Ring Payment to Amazon Subscription

My current annual Protect Plan was ending. So I attached my Ring account with my Amazon account and purchased the same Ring Protect Plan via Amazon Subscription Services prior to the date that my annual subscription would end. The Ring app and the online Ring website keep advising me to 'attach' my Amazon Subscription Plan, but it won't let me since I don't have a device available that I can attach the Amazon Subscription Plan to. So, I figured that it would happen the day my current plan ended. NOT! The date my current plan ended, Ring reset the annual plan date to next year even though no credit card was on file with Ring. I also received a message from Ring that I have a week to add a credit card to my Ring account. And still now, I CANNOT attach the Amazon Subscription Plan to the Ring device on my account even after my annual plan has expired. I have no idea what will happen in a week if I don't add a credit card to my Ring account, but I already have an Amazon Subscription Plan just sitting there that I cannot attach to my Ring device. I'd just like to attach the Amazon Subscription Plan to my Ring device so that I don't loose my Ring videos. What now?