Tcl m3g maybe brick

Hello
excuse my English please ,cause i'm french man
I had a tcl m3g chinise rom miui ,root
The phone propose me an update on ota
i accept and and now its impossible to restart my phone
i plug it to my pc and it says unknow device with 5 disk detected
Py pc says that i must formated them to work
i do that and know its horrible
impossible to restart my phone,no drivers work .no recovery mode ,no download mode etc...
can you help me ,please