Apple India — Customer care support zero

Address: 400080

Apple is treating me like a donkey. I bought an iphone 15 days ago and top rated apps are getting crashed. I have visited authorised service centre twice. Also i have contacted customer care for more than 4 times. Still my issue is the same and not a single action has been taken. Apple known for after sale service hasn't helped me it's already been a week. I am really frustrated and willing to return my phone. Its my worst experience.