Indian Railway Catering & Tourism Corporation [IRCTC] — by 3am vendors start yelling chai chai

Sir the pantry workers and non lisenced vendors start selling tea/coffee as early as by 3am. This is creating nuisance and serious disturbance to passengers who are sound asleep. The yelling of chai-chai should be put to an end and at a fixed timing the vendors must start their activities probably after 6.30am till 20pm.. On at least two occasions i had requested the vendor to abstain from yelling, but each time he comes back with a louder yell. This issue needs to be addressed in all the indian railways irctc network for action that gives passengers a noise free sleep.