This bitch keeps calling my fiancé after being blocked. I’m pissed. What can I do about it?

I already talked with her on the phone. I texted her. He told her as well, he called her and texted her. We both told her to stop talking to him, he doesn’t want to talk to her. He doesn’t want to be friends with her. She keeps calling at random hours. 6am, 5pm, 1 am. Does this chick even sleep? It doesn’t ring his phone but it still shows up on his phone call logs.

I’m fucking pissed. How stupid does one have to be to not get it? What can I do at this point???