How do you know if a mold issue was totally remediated from the home?

I had a serious mold issue in my rented home. The landlords have been moving slowly in resolving the issue only focusing on one area of the home. I would like to know the time frame to inform the landlords that the problem isn’t being corrected and may be causing a serious health concern with me. If the landlords feel that they exhausted the process to remediate the mold, what are my options?