Not interested in Black Peoples Applications

This Company deals with Residential that are available for Rent in Bloemfontein. Its very unprofessional and shows lack of interest regarding Peoples requests/applications. I have been in contact with them. Send them messages but no one returns to you. Made calls etc. My suspicion is that they can hear/see i am black as such they are not interested in my application. Out of interest i perused thier website. Only see white Agents within this company which ads up to my suspicion!! Such business must not be exposed for who they are.