hi.. im looking for help trying to fix my phone... after unroot my phone and been playing with TWRP, i accidently wipe some data on my phone.. now its working slowly and freezing all the time.. ( still working but to slowww) and now i can even see fastboot , i know i still can get in on fastboot ( power + down vol) but i can see nothing ..:'( ( black screen).. i m wanting flash my phone and back to factory stock... just don't know how...i ill appreciate all help . thanks