Amazon India — amazon refused returning and replacement

Address:

Allahabad, Uttar Pradesh, 211003

Dear sir,
I had ordered a redmi note 8 pro for rs 16500 and got it today but the product i got is defective as it's sound quality is too bad and not clear at all which will make you feel it's a duplicate product. When i called customer care they said they can't replace or return. Please help me i will file a complaint against this company in court if they don't return or replace this faulty product.