Trapped in Fastboot-Mode / TWRP - Help needed

[Snotspill]

Dear all,

some time ago I tried to root my device (BAH-W09), but unfortunately not successfully.
I can get into TWRP but that's about it.

Problems I'm currently facing:
- System does not boot
- Available modes are only Fastboot / TWRP & Recovery
- Recovery does not work - Error Message: "Getting package info failed!"
- TWRP strangely shows a startup-screen "Unmodified system partition - keep system read only?"
- In consequence no matter what option I choose, installing anything using TWRP does not seem to change anything in my system
- Folder Names are (nearly) all completely messed up like "3vE7CB2ReCwM9U0KtYVrpA" and the like - probably encrypted.
- HiSuite is no help either, as I can't connect to it (in Fastboot-Mode)

Currently I think the only way to get out of this would be flashing a correct boot.img using fastboot.
However I can't seem to find a suitable file in the whole net. Even Huawei does not seem to offer anything in this regard?!

Any help in this matter would be highly appreciated!

Snotspill

P.S.: Is there any fastboot commad like "ls" so that I could view data & folders in Fastboot mode?

 

[Snotspill]

Solution:

1) Downloaded the FullOTA-MF from this page: http://huawei-firmware.com/rom/huawei-m3-lite/bah-w09/13626
(First Link from this list: http://huawei-firmware.com/rom/huawei-m3-lite/bah-w09/13626)

2) Installed "Huawei Update Extractor" (https://forum.xda-developers.com/showthread.php?t=2433454)

3) Extrated "RECOVERY.img" from "UPDATE.APP"

4) Went into "Fastboot-Mode" with my tablet

5) Launched "Minimal ADB and Fastboot" on my PC

6) Used the following commands:
fastboot flash recovery RECOVERY.img
fastboot reboot

=> Tablet is running again!
(Actually I did a couple of more things, but I'm pretty confident that these have been the most important steps in this matter)

Note: Now that my tablet is unbricked, I noticed that there are actually two versions of the recovery menu, with different options!

The "real" one seems to be only accessible when TWRP has been removed, which in fact seems rather logical.
It has the three options: Reboot system now | Wipe data / factory reset | Wipe cache partition

The other (rather not so useful version) is accessible when the tablet is connected by USB to some other device and has different options)