My response wont post.

My response to your answer to my post about spam imessages wont post. Ive tried numerous times and it says unable to post.

Thank you. I have blocked the sender every time i get a new message. And I do still get notified when the new ones come. Also blocked the other multiple numbers the sender has sent the messages to but each time,it is from a different number. I just continue to block them. 

As for silencing unknown callers as it says in your link,my phone is a 6 and doesnt have IOS13. And this isn't an option on my iPad. Jane