How do I block receiving Application-to-person (A2P) SMS, one way messages?

I would like to know how to block the commercial spam messages that I receive through (A2P). They are not regular P2P SMS texts, but they are received on the regular stock messages application. They cannot be blocked with the application because it can only block messages with a phone number, and these A2P messages do not have a phone number.

I have push messages and call broadcast turned off. How can I block this spam, please?

I Posted this before, but no reply. Can someone help, please?

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