Bricked me176cx need help please

i had changed the system fonts and it worked well, but i didnt liked the font so i deletes system/fonts and replaced with the /fonts/ of a software update and i think the permissions are wrong in the file, so i need to reinstall andorid 5.0 but how can i do such thing? and i also have adb access, but for some reason i cant make adb shell -- su
so how can i fix this ? do i have to sideload lollipop again?