Xiaomi India — redmi note 4 after updating to mi9

My mi note 4 have a ghost touch after updating to mi9 the phone is rebooting for many times. If the device on then next problem is unfortunately closing every google apps. Then the phone will uninstall many apps without my knowledge. I can't even make a urgent call due to this issue. I had made my friends away from taking mi note 4. I recommend them vivo or oppo to spend their cash usefully. I will continue this. And no one is gonna take any redmi device with my knowledge. If you want me to stop this please fix this issue.
Hope a reply soon
Thank you
Rahul krishna tm