Hello, I'm sorry you have that problem and my heart if crushed. I would be devastated if that happened to me.
But hopefully this will fix your problem.
I will now teach you how to do a factory reset on your phone this will restore it to factory settings and will unroot it and will bring back all your metro installed aps leaving your phone good as new.
So here is what you do. Shut down your phone. Tnen make it turn on BUT as its turning on hold the Top button on your phone and the volume down button and the home button all at once just keep holding it until you see some thing diffent happening to your phone. You will see a Box open with the little android next to it. once you see that wait a little bit then let the buttons go.
Then patiently wait for your phone to restore itself. (can take as long as 5 minutes) if it works the phone should be good as new. But all your apps will be gone.