How do I format my Huawei m866 after it crashed

Contact your network provider

Try this link:
https://m.youtube.com/watch?v=_KACyjeffXA

First method:
1.At the very beginning hold down the Power key in order to switch off the cell phone.

2. HardReset.info: Then hold and press the Volume Up + Power button for a couple of seconds

3. You can release held keys when the phone's logo appears on the screen.

4. Select using Volume buttons option "wipe data/factory reset", and confirm that with Power rocker.

5. In the next step choose "yes" from the menu, and accept it with Power key.

6. Now choose option "reboot system now" by using Power button.

7. HardReset.info: Success! The hard reset has just been performed.

Link:
https://www.hardreset.info/devices/huawei/huawei-m886-mercury/hardreset/first-method/

Please call for your operator for support. It seems your phone has some serious problem on its ROM

its fried man or hard reset it

Android phones can be reset from the Android System Recovery menu. This video will show you how to do this. You must find the key combination for entering the recovery menu.

have you tried contacting your provider?

its touch panel is faulty need to be replaced.

Try this link I found http://www.jollyandroid.com/html/huawei-h866c-huawei-m866-user-manual.html I was able to download one

MOBILE PHONE TYPE> HAUWEI M886 ANDROID SMART PHONE
SITUATION > TOUCH SCREEN NOT RESPONDING I CANNOT PROVIDE MAINTENANCE TO MOBLE PHONE... IT TURNS ON BUT CANNOT MAKE SELECTIONS