Royal Enfield — Frequently engine on and off

Address:

23/36 VENKATESAPURAM NEW COLONY,3RD STREET,KANNIGAPURAM,CHENNAI 600012

I purchased a royal enfield classic 350 on september 2018 I have faced some problem in my bike number is TN05 BS 6798 . I done service Address: AKG MOTOR SERVICE Plot No 51/51A ETHIRAJ SALAI, ERUKKANCHERRY, CHENNAI NEAR KVT HOSPITAL, Chennai, PERAMBUR, , Tamil Nadu Chennai on june 2021.i informed to service center frequently engine stops when on my ridding.After service it cost rs 3199.35 But they have not solved the problem.Then next day i went to show room i raised the same complaint and he attend the complaint in my bike But still my bike having same complaint and not satisfied this service centre
pl let me know the good solutions to my bike

Regards
Nandakumar, [protected]