Yes i agree with perna u are older then her and doing a very good job of deleting her..
If u don't want to have any touch with her.. Then i think it would be good to completely drive her out of ur mind..
If u don't react she won't ever be able to bother u..
I know it's hard to forget when someone says such a thing abt u..
If she still doesn't stops tormenting u go to her and talk straight ..
she might say she is innocent but u just make it clear to her that u don't want to have anything to do with her....
I hope all get's well..
Tkcr..
Have a good life..