They're trying to say you bought a phone with bad software. You may want to contact the company to see if they can help you. I'm saying that because my guess is not many people have your phone and will read this and can then help you.
There are countries in Europe that use a broadcast system and not SMS to send emergency alerts. Depends on your location. I'm guessing that with growing environmental catastrophes and the military threat from the East a lot more will be done with these kinds of alerts in the future.
Well, I disagree with you.
Anxiety, for some of us, is a bad thing in itself and not a negligible side effect. It may not be for you. And consequently I would not have advised you to stop googling medical problems.
But I felt that OP's anxiety was not helped by excessive googling. And it was in this spirit that I advised OP against it.