Xiaomi India — I have purchased mobile on 6th feb 2021 and within 20 days I have visited service centre 4 times and no resolution is being provid

I have purchased mobile on 6th feb 2021 and within 20 days I have visited service centre 4 times and no resolution is being provided by them. Its only 20-22 days purchased mobile and it is defective. Please help to refund my money else replace my mobile with new one.