Hero Motocorp — For bike engine problem

Address:	Chambal auto motors shrinath puram kota rajasthan pin code - 324010
Website:	Hero motercorps

My bike no.- RJ20US3135 engine has problems 4 times in the last 1 year. There is a problem of crane in the engine, due to which the bike gets jammed and the bike stops, even the service center people do not pay attention. The problem is coming since the last time I had brought the bike. and back off. From 18/01/2023 my vehicle is at the service center only.
Didn't even give me the bill twice during the service in between, please give a proper solution.