Just a word about restraining orders.
It's very true that they do not, in and of themselves, keep anyone away who is determined to return.
The advantage of a restraining order is that it results in mandatory arrest BEFORE some other crime is committed. Thus, the offender can be locked up after a phone call, after showing up on your doorstep with candy and flowers, after sitting outside your house watching you from the car.
It also provides other temporary relief, such as financial support, requiring that utilities be paid, etc.
It isn't a kevlar vest, but it does, in fact, provide some protection. A DV counselor or victim advocate can explain what it does and doesn't do.
Chicory, I see no need for you to accept his phone calls. Give yourself a break. I was envisioning a kid in his early 20s. A man of 38 should be responsible for himself.