How do I get rid of mould?

I live in what appears to be a very damp (rented) flat. Unfortunately the landlord appears to have painted the flat in a water-soluble paint so I cannot use water and an abrasive cloth to try to remove the mould. Is there anything else anyone can suggest? Can't afford to move and am always nagging the agency, but to no avail. Any sensible suggestions would be greatly received. Thanks in advance x