My phone has been hacked!

This guy is in the room right next doour to me he's an insane Tweaker With Napoleon/Hitler complex. H recently put me in the hospital,!! Attacking me with aI hammer. And I am handicapped lung cancer and Diabetes. Anyway the problem is he hacked my android lg 3G phone And redirecteed,rerouted and reformatted everythingI He also You erased lot of evidence I had against him. lost my zip files and PDF files. Wheneverr I try to access them it says unsupported file. How do I reverse all of this madness and get this asshole out of my phone. Thank God they did take him to jail!!!