Problem with network emergency call and no service after system update

[shahabelahe777]

I have huawei p smart with ndroid oreo 8.0 . As soon as system updated by wifi the antenna gone and i cant make calls or acess to mobil data
How can i delete the update and solve my problem
I try clear data and reset factory later but it didnt work

 

[webworkings]

The system update, was it done via the phone's "Settings" through an update listed there, or was it done another way?