I have destroyed my android os completely , help please

[Android Central Question]

So a while back i was trying to root my Redmi Note 4 (MI) phone, i failed to install the twrp and missed up badly, because after that i couldn't reach the recovery mode anymore, but the phone was still working and can boot up normally , until i got usual update and tried to install it , the phone couldn't make the install and while it was rebooting showed the message " the system has been destroyed " " press power button to shutdown" , and now whenever i try to boot up or enter recovery mode the device shows the same message . i still can enter Fastboot mode .
please help , i just want to know if i can do anything beside sending it to a shop to fix it , i would be very grateful if someone can help me.

 

[Rukbat]

Find the firmware file. It's probably flashable through the fastboot mode. (Wherever you find it, you should also find instructions.)

 

[sunnypirate]

Probable solution: Can you check once if your micloud is full, If yes clear some space, delete old backups and check.