how can I block the phone number , who called me and from cell phone? I can not change my number.?

Usually we can block land line witn national do not call list but not the cell phone. It is very important. I dont want her to call me and I told her alrady not to call me. I dont want to go to police for restraing order.

You may need to call your cell provider and ask that the number be blocked, for a fee. Most phones do not support blocking numbers at the device level.