If you're concerned about your issue being taken seriously, you can also reach out directly to the head of human resources. [substeps] Double check that only the person you want to contact is addressed in the email.
[header] How to write an email to human resources [title] Address your email to the proper person. [step] Check the human resources directory and see if there's a person assigned to handle the type of problem you need addressed. There may also be a point of contact assigned to your department in the company.