Hero Motocorp — unusual sound from the engine and getting rusting

Address:

Thekkumpuram House, Nellayi (P.O),Thrissur ,Kerala

We bought new hero passion pro before 6 months, but it is getting severe rusting on the top of the engine and un ususual sound from inside the engine.
The company which we bought this bike is not at all considering this problem. Still two service maintanance is pending. They only use to change the oil in the service and not at all bothering checking the above mentioned problem.

* this rusting is happening from the last one month.
* but the sound is hearing from the second week of delevery.

Owner name :- francis t l
Engine no :- ja06eukha01122
Chassis no :- mbljas03xkha00554
Model name :- passion pro110