I need help, I'm being harassed by a mentally ill family member

Im writing here because I have exhausted every option I can think of. Im being harassed by a mentally ill family member. for 10 years I had no contact with her and then she pops up out of the blue to destroy everything in my life again. being that shes a family member she knows where I live, and the number (its not my house, I cant change the number and I cant block hers cause shes always replacing her cell) I feel pretty much like I have nowhere I can turn. shes made threats to burn down the house, shes threatened to kill me or beat me, shes verbally abusive and shes turning the rest of my siblings against me because they cant see thru the fascade. I have hundreds of text messages saved in my email that clearly show how unstable she is but the information I have is pretty much useless. I’ve tried to get a restraining order, I was told that because its family class I had to apply for a peace bond instead. I was denied. I have no audio proof of her threats and they dont accept text messages or emails as evidence. this woman, and I use that term loosely, is a severe mental case. I dont want her any where near any aspect of my life. Im trying to move out of the area but wont be able to do so for another few months. is there ANYTHING I can do to put a hold on the histrionics even for a little while? its not right that I should fear leaving my house to get the mail. I should also mention that because she changes her cell phone all the time it doesnt matter how often I block her from my accounts and given that she is a blood relative she can get access to any other accounts I create simply by asking someone else in the family.