[frobozz]

Always take it to your union rep first. Your union is your advocate, and is there to help you.

They can advise you on the most appropriate next step for your particular workplace.

They can take it to HR, anonymously (depending on context), for you.

They can ask their members if anyone else has similar issues, in order to add weight to your complaint and ensure that HR take corrective action to fix the source of the problem, rather than sweeping individual complaints under the carpet.

They can advise you on presenting appropriate evidence so that HR see your complaint as valid, rather than as a whinge.

[cylinder]

Are you American? White collar unions are basically non-existent in the US private sector.