Royal Enfield — engine bearings sound

Hi,
My name is kammari mahesh. This is a serious issue about my bike (Royal enfield classic 350). Fo my bike completed more than 5 services but still my bike making so much of noise. I think i got defect one and even in service centres are very reckless not taking any responsibility.
Please solve my problem as soon as possible.

Thanks
Kammari mahesh
Ph. No-[protected]
Hyderabad, kukatpally-5000072