rude messages

A man keeps texting his son's mom's phone rude things. She left her phone open so her son could text his dad. But he keeps texting her and her son, calling her names and using other bad language. She's wondering how to block his number.

Please someone pray for me. I think am depressed. I feel like the world is crushing on me. I got married to a guy younger than me, he hasn't had a job and av been there for the best I can. He has cheated on me several times, he has said some hurtful words to me so many times. We have a 1year son...