I've been with Wells for over a decade. They have never called me. Never.
I have had "fraud" alerts hundreds of times. They always happen at certain POS, and it's always a text alert.
Some of the stories I read make me viscerally react with "what in the world are you doing with something as simple as a bank account?"
Also a fundamental default is "no action". If you are even slightly suspicious, do nothing. It isn't somehow so important that you stop thinking and just act or react. Just stop.