Xiaomi India — MI note 9 pro complaint about auto reboot and screen black out some times after pressing power button

Address:

Panangattu melathil kizhakketheruve po kottarakara, Kizhakketheruve

I brought mi note 9pro on 2020 sep 20.only 20 remaining for expiring warranty .about 3month before my phone get auto reboot while calling .there are about more than 10 time this problem repeated. another problem is when I press power button and swipe to unlock phone some times my phone screen get black out . again I press my power button and swipe to unlock phone the screen become black.after 15-20 time repeat this process only after that the phone will be act normal.

These are my problems .I contact to costumer center and they told me that its a bug.And they solve it..after some days the 2 same problem repeated.what I have to do ...

First I brought samsung mobile it also show many problems.so I sold it and brought this.
I believe with costumer satisfaction and product quality of mi .but your company disappointed me..I want a defect less product.. please do needful regards this problem.

Yours faithfully
Your valuable costumer