If you see the message Image Signature Verify Fail is because the original recovery is not installing zips files with the appropriate signature (Huawei).
Most official ROMs that have been released for Huawei (Huawei or operators) usually go in UPDATE.APP format, which can be installed through the Firmware installer, thus regenerating the Bootloader to solve most of these problems.
The only solution to this case would be to have the compilation that we have tried to install in UPDATE.APP format (or higher). If this file does not exist, I'm afraid we have no choice but to go to the technical service.