Labour Union system was evolved precisely to tackle issues faced by people like Rajesh.
May be Rajesh can tell, how big is his organisation, nature of business, how many such people are affected, is it a privately held company or a stock-exchange listed company. If it is a privately held company, arbitrarily run by the owner, he can start collecting evidence such as appointment letters, salary credits in banks etc. and then approach a lawyer for issuing a notice. Alternatively, they can approach the labour comissioner for redressal. Best optioln could be to meet a labour lawyer with enough evidence.
When people join an organisation, it is always with a hope that they will get the promised salary, career will grow and they will be able to lead a comfortable life. More often than not, things go wrong and we end up in an awful organisation, which may not have any focus on employee welfare.
Best wishes