Relationship problems

I have a bad past with my exes and have beem willing to let ot to go but, they can't. Some how they've been hacking our things posting things that we send in our privacy if you know what I mean. I'm the only person she's been open enough to share things like that with. Even though I had nothing to do with it & don't know who it is and how to stop them from hacking. I don't know what to do. Help!