How do I stop spam text messages from hundreds of different numbers daily? I'm receiving a new spam message every 15 minute from a different phone number

I'm receiving the same spam text message but from a different (possibly spoofed) sender's phone number every 15 minutes. (So blocking the phone number is useless).

As a note, for some reason the iPhone doesn't let me "report message as junk"

-blocking the phone numbers I tried but because they are using a new phone number every 15 minutes, it does nothing. It is a useless method that will not stop the spam messages.

-I don't want to use "filter unknown senders" feature because a lot of people I know aren't on my contact list, and I would prefer them to not be filtered out of my messages.

-tried forwarding the message to 7726 but 7726 isn't even responding to me and this really isn't going to help.

Theres no way to block text messages containing certain words or numbers in phone? I know android can but why can't iPhone? I can't block a new spoofed number every 15 minutes. As it will achieve nothing.

The phone numbers spamming me ALl use the same area code. Why can android block certain area code but not iPhone?

Please assist. I shouldn't have to pay for 3rd party app. The iPhone should let me block certain terms in messages.