Royal Enfield — silencer burns second time!!

Address:

Village - Safiyabad , P.S-Baikunthpur , District-Gopalganj, Gopalganj, Bihar, 841416

Dear support team,

Bullet-500cc
Bought on-15/11/2017

Silencer was burnt (Colour of silencer turned yellow and black). The complain was heard and changed after so many requests on 10/10/2018 @9000km.
Issue is same again at 20000kms and just within an year.
Complain has been raised and it was being handled by royal enfield riders cafe-gopalganj.
Bike was taken into custody by royal enfield riders cafe-gopalganj (Bihar) for 2 days and returned back saying 'it cant be done' because :
1. Petrol is being used by from different petrol pumps, quality of petrol
2. Engine is being heated up so it will burn.
3. Major driving pattern, access acceleration
4. There is fire burning inside silencer (Not inside engine it seems) as per mr. Karan and mr. Jeeten-the two senior person from customer care.
5. Bike is out of warranty

Complain id-ccshoc[protected][protected]@royalenfield.com)

I need permanent solution. If silencer changing doesn't work, change the bike/change the engine.

Bike no-br01dn3900
Name-vijay singh
Phone-[protected]