Apple India — purchase iphone 8 plus on 10 feb 2018 and found manufacturing defect in the iphone 17 feb 2018 deposit the product in apple authorized service

Address: New Delhi, Delhi, 110085

Apple selling spurious product purchase iphone 8 plus on 10th feb 2018 and found manufacturing defect in the iphone 17th feb 2018 deposit the product in apple authorize service center

I have purchased the apple iphone 8 plus 64 gb from authorize apple retails on 10 feb 2018 and found manufacuring defect (Display has black spots and vibration mode was not working)
Deposit the same with 17th feb 2018 to authorize service center of apple
Now apple is not replacing the product they are repairing
I need replacement of iphone 8 plus (Fresh product)