Royal Enfield — Regarding silencer issue

Address:

Chengalpattu,chennai

Hi,
Am using gunmetal grey 2019 model BSIV engine. First i loved to ride with my bullet. It's amazing. Driven km 20500 till date . At 13000 km my bike silencer got rusted inside (mufler got rusted). If we raise rpm they came out like a powdered form. I complaint in royal Enfield support mail. They said me to visit nearest service center to claim waranty. i did what they said. They took complete vehicle photo with frame number. after one week i make a call to that service center, they replied as this damage not comes under warranty. I don't know why they said like this. Actually there is no damage in outside. But internally happened means that is product defects right. I completely disgusting to use royal Enfield bikes now.