Q: My apple iPhone 6s logo has moved inside.

It's a manufacturing defect. When I am pressing softly on the apple logo on the back panel, it's moving in. Water has seeped into the phone and has stopped working. Apple service centre people are saying that it's a lquid damage so they can't do anything about it. But water has seeped in from that space created on the apple logo. What should I do?  am not going to leave this matter like this. My iPhone is in warranty and manufacturing defect are covered under the warranty.