You Can Run...
Cellular calls and texts don't go away. They remain on a cellular server. Even when erased. Let your Phone Log compile those calls as proof if he contacts you impermissably. A pic of him at your door or in a parking lot can be date/time stamped by texting it to a friend or by e.mailing it to yourself soon thereafter.
A phone location when used in a call can be confirmed to about 10'. This has been used in some Abduction cases and similar crimes.
A retired cellular engineer...