MSI B450M pro vdh plus - upgrade bios fail

While trying to upgrade the bios of the mobo to the latest version 7A38v98 downloaded from the official website, the process stopped at approx. 70%
then nothing, no boot, no beep, no display on the screen. After all recovery attempts offered on the web, I gave the card to a repairer, he used an external programmer to flash the mx25u12873F chip directly but he used a gigabyte B450M gaming bios !!!
the pc starts normally but presents a Gigabyte bios and displays my card as being a Gigabyte !!
I tried to reflash the bios with efiflash, afudos, q-flash in different DOS, WINDOWS platforms, but I get error messages such as:
46 - error obtaining flash information
- error get bios information
- bios id check error
- write-protected bios
Someone could help me to restore the mobo.
Thank you