You might want to try this before heading to official xiaomi repair shops:Yeah, ok. I'll do that right after I unbrick the phone.

[GUIDE] [begonia] UNBRICK - stuck on DA mode / Authorised Service Account required
/* * I'm not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed (like it did for me...). * Please do some research if you have any concerns about features included in the...
Maybe worth trying.