Said “Bye” To My Deposit

I lived with a guy for two years in a 2/2. My bedroom came with a private bathroom, and his was the public one, so I never had a reason to go in it. When we moved out, I saw the shower curtain drawn back in his bathroom, and the walls and floor were covered in black mold except for clean spots around the handles and a spot in the center of the tub (under the showerhead.) We didn’t get our deposit back.