Here’s what you need to do it’s free and easy. Contact the health department, explain the situation and they will help.
You can also tell your landlord “if you don’t address this I will be contacting the health department and building inspector.” You would be amazed at the type of power those companies have over landlords. We had an issue with something and I spent 30 mins reading online. Quickly learned that anything health and safety related is a major issue. They legally have to resolve it. We told our landlord “this is a health and safety issue, resolve it or we will report it.” Hours later the problem was solved.