This is a matter of casteism. In short, casteism refers to one-sided loyalty in favour of a particular caste. Casteism tempts members of one caste to exploit members of another caste for their own interests in the name of superiority or inferiority.
Casteism is manifested in the form of clashes between various castes for a higher share in the socio-economic privileges and power.
Article 17 of the Constitution abolished the practise of untouchability and criminalised its practise.
i) Abolition of untouchability is guaranteed by the state against private individuals under Article 17.
ii) Offences committed on grounds of untouchability lead to disqualification from election to parliament and state legislature.
iii) iii) It is an absolute right guaranteed by the Constitution.
Article 35 of the Constitution of India (Article 35(a)(ii)) gave Parliament the power to make penal laws for the offences mentioned in Article 17. As a result, the Untouchability Offences Act (renamed the Protection of Civil Liberties Act) was enacted in 1955, which provided for penalties if a person was prevented from entering a place of worship or taking water from a tank or well.
Later legislation focused on discrimination against and oppression of Scheduled Castes and Scheduled Tribes.
These include:
The Scheduled Castes and the Scheduled Tribes (Prevention of Atrocities) Act, 1989
The Scheduled Castes and the Scheduled Tribes (Prevention of Atrocities) Amendment Act, 2015.
From the Acts and Articles, you can file a complaint against your company based on the laws mentioned above. They can’t forbid you from getting a promotion if you are a deserving candidate on the basis of caste.