Landlord not responding to rain leaking into my office space

I lease a space for my medical practice on the top floor of an older building. My suite and other adjacent tenants have all had issues with rain leaking into our units over the past several years. The roof clearly needs to be replaced but the landlord has been doing patchwork fixes and the leaking has gotten worse. It now affects two of my patient rooms, as well as front desk area. This last week it rained heavily and rain was dripping down through one of the ceiling lights.

I have contacted building management and the landlord multiple times about this and other issues but they have basically stopped responding. What are my options?