Axon 7 not able to install TWRP or lock bootloader
I need help with my Axon 7 (A2017G)
I upgraded my phone to Oreo 8.1 (AospExtended), played with it a bit, but decided to downgrade to 7.1.1 (stock) again.
After I did so, I noticed something different. Firstly when it boots up, this screen appears
It goes away after 5 seconds and boots or if I click the vol up or down button, it takes me to this screen
If I choose anything other than Recovery, the phone just boots up
If I choose Recovery, it takes me here
I cannot boot into recovery mode at all. I can't find out how to install TWRP recovery on here at all.
Also If i boot using power+vol down, this appears
Please advise how to install TWRP and lock the bootloader