I often say you get what you paid for, but if you pay for Chinese garbage you get significantly less and everyone except the owner of the company suffers.
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.