Royal Enfield — Product issue

I have been using my vehicle from past 2 years TN49CB9000
Lots of issues and problems repeatedly I am facing it. I am unable to use my vehicle effectively on the road. Even a small segment vehicle battery is having good backup capacity. I changed battery because o[censored]nable to start my vehicle and getting switched off frequently .after changing also same issue happens while driving itself its getting switched off. Again came to service centre they changed the spark plug. Within a week time again same issue. 2 nd time changed the plug. Within 10 days time repeated problem as unable to self start, and need to kick everytime if Its gets switched off. I need to always race the engine to keep the vehicle on in signals and stops. Till now I never did my service apart from RE service centre. My other friends are using more than 4 years nothing issue for them. From the beginning I am facing this issues. I again left my vehicle of servicing. It affects my work schedule and business also. Lost my peace of mind. I am not a rash driver and I maintain my bike properly in time. Do the needfull to resolve this issue and not to get repeat. It's all technical parts issues.