Cheating Wife Learns the Grass Isn't Greener...

My ex wife, who I caught cheating 3 months ago (after which I immediately left) has been repeatedly emailing me and using star 67 to circumnavigate my blocking of her phone number. It seems like every week at the beginning of the week she has some sort of episode and decides I was the only guy for her and incessantly harasses me. It doesn't make sense to me as I know she is/was actively dating and I have been very clear that I don't want anything to do with her. She called me 18 times at 11:30 last night with accompanying emails telling me she loves me and asking me to please pick up. This woke me up out of my sleep and made me very anxious. She then calls me at 7 am, then 8 am, then 9 am. This happens seemingly once every week. I have previously told her that I will only communicate with her pertaining to financial ties and divorce proceedings and only on Monday morning. And I have only done so and haven't contacted her or answered any of her phone calls for two months. Every time she contacts me, my heart starts racing and I go into fight or flight, the adrenaline is crazy, and I am always checking my email to see if maybe she could have put the right words together to convince me that she is truly sorry for having destroyed our marriage. Even though I know that closure doesn't come from her. I think I have to change my phone number. I've been putting it off because I've already done it once, but she found my new one in our divorce paperwork. Don't know where I'm going with this but any advice pertaining to my situation is welcomed.