ZenUI Crashed, can't use factory reset

APP Name:
Rooted: No
Frequency of Occurrence: Just today. Yesterday was fine.
RAM: 4G
Firmware/APP Version: WW_Phone-15.02.1904.453
ZF Model: ZB555KL

Good morning friends.


I have to ask several problem, my phone sytem has crashed for no reason, several apps has been stopped and keep spamming those notifications. I tried to restart and nothing happens, also i already tried to factory reset and the result is nothing. I've tried to remove several unused app such as game that i not to play anymore and some keyboard app, but when i try to restart it again, those apps still installed.

What should I do friends? thanks and have a nice day

p.s: This is my first time post.
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