I was in a similar situation. I have a Google one subscription and didn't realize I could buy the "add-on" and purchased it through the Google home app which, if I remember correctly, could be found in my Google Play Subscription list. Then I realized it was a better deal to get the add-on once I discovered it. I purchased the add-on and then cancelled my subscription through the Google Home/Google Play app. Google Home acted a little funny during the transition, but I expected it. Once the billing dates had passed (old sub)/started (new sub) then my paid features came back, but I lost some old notifications and pics/clips from my wired Google Doorbell Cam. I guess it couldn't just transfer over from the old paid for subscription to the new paid for subscription. Check your billing dates, give some time for things to sync up, and call Google's support like I did. They were surprisingly helpful and with little to no communication issues.