Xiaomi India — Replacement of the detected phone

I'm here requesting for such a long time but still my problem is not solved. This is the worst service from your end. I have many places to be right now but all I have to do is follow up you guys. I am really disappointed from your service.
I'm facing a lot of problem because of this as I have gifted the phone to someone. I have already repaired the phone 3 times but still I'm facing the same problem again and again.
And I have also called the POCO service center many time they only respond that your complain will be resolved and all stuff even if I ask them to connect me to their senior they are not at all able to connect me to them.
Please resolve this soon as I'm waiting for a long time.