I am really sorry your ex-H is putting you through this.
They really never do go away - and they never really do stop thinking about us, even if it means trying to destroy our hard earned equilibrium. Never mind, as you say, they are the masters of their own misfortune.
I hope your lawyer may have some advice for you, maybe not harrassment charges but some sort of restraining avenue. I know there are ways to also recoup legal costs, but often that means heading to court.
If not Bea, continue to ignore him as best you can. And try (even though I know how hard it is) to relax and take care of you.