ON THE OUT C.I.C complaint: Been discriminate by my colour

Am homeless ..I was doing volontery job for them for nearly 2years they helping people who got released from prison also referred them to hostel even claimed money for some of them to get deposit for an accommodation…at that time I was living in a Church shelter because of my immigration issues.. so they told me soon I get my visa it will be the same for me they even promise me that I will work for them because it’s pay job now.,.but when got my visa nothing happens they gave hopeless when was asking for their support they say am rushing them I have got depression since then because I don’t know what to do everything I tried to contact them they avoid my call even my texts they even blocked me….Mike the manager is making good money 2000£ a month his an addicted of weed he make himself like a better than others he always keep judging people…and letting people deep down when they needed help. He was telling me to go back to my country without respect that I have 3kids in here..I am suffering mental emotional..I want to consideration my complain against the manager of on the out name Michael Bradley. Thanks