Apple India — The phone has problem but no replacement done

Address: Bangalore, Karnataka, 560073

I submitted the phone in iCare Elements mall. They said the problem is solved and there is no error with the hardware. I went the next day to pick the phone. I diagnosed the phone myself and found the camera to be faulty. It is after that the Apple support said they will repair the phone but I had informed them I do not need repairs on phone rather replacement. But even after informing about the same they are carrying out the repair. Which I do not trust them to be fine at.