Google photos used up all of my data (including all of my carryover data) in * days wit...

Google photos used up all of my data (including all of my carryover data) in * days without my knowing it. I have been using smart phones for a decade and nothing like this has ever happened before. I feel robbed and disappointed in Google. I never intentionally turned on a setting that would allow the google photos app to backup or update videos and photos while using cellular data so I'm wondering if this was turned on because of an update released by Google? At a minimum, I would expect the app to confirm through a permission request that I wanted to backup the photos prior to performing that operation while the phone is not connected to wifi. Surely, the developers and Google could anticipate that one video could easily wipe out all of a user's cellular data simply by performing that one non-essential operation. This is not cool...I expect better from Google