Removing annoying reminder from app

I have just added a ring alarm, (had the door bell for ages)… I don’t want a subscription. How can I get rid of the annoying reminder to subscribe that comes up on the app?
It’s harassment by stealth!!

You buy a product that works best with a subscription, and you wonder why?
Maybe it’s better to use an alarm product that doesn’t offer a subscription.

Every situation is different, I have a sub for ring, but my circumstance for the alarm means I do not need an enhanced sub, the basic function fits the need of our location.
However, the question was how can I stop the in app advertisement that covers a third of the screen? Not why do I need a subscription.
Anyone know how to get rid of it?