Xiaomi India — faulty redmi note 7 pro

I have received faulty phone of xiaomi and i went to service centre 2 times in a month i its been only one month and this is the 2nd time i went to service centre. I asked for a exchange had word with so many customer care people no one provided solution to me. Service centre people said they can't exchange a phone. I want to replace my phone. Please look in to the issue