Apple India — iphone 6 not satisfied with the repair

Address: 201005

I have gone to the apple service center multiple times but they are not giving me the proper solution for my phone. Whenever i return with my repaired phone, again i face some or the other issue with my phone. They are not ready to replace it. And apple offers replacement warranty but they are repairing it temporarily and giving the same phone back to me.
After 2 or 3 days i face some other type of issue.
I am really disappointed with apple.
I was expecting way better than this from apple