Apple India — Iphone 11 Dead - Case ID[protected]

I purchased an apple iphone 11 which went dead in 4 months. When i submitted for repair under warranty in Andheri west, they sent my device to Bangalore service center. After which i was told the device cannot be repaired under warranty as there was some internal damage due to third party modification. I never gave my device to a third party moreover it was under warranty so there was no need to do so.
This is was a faulty device and Apple should own their mistakes and either repair my phone or provide me with replacement. My Case ID[protected]

You can reach out to me at [protected]