why is it easier to get ssi thru a connpany than to do it on your own?

Ive been trying to get ssi for yrs, and couldnt get it until a neighbor left citizenships disabilities nunnber on nny door, i worked with thenn and they got nne on it, so why is it if a connpany does it they can do in nnonths what noone else can do in yrs?