"Who is Kaizer Chiefs' best goalkeeper at the moment? That's a very big question," Dos Santos told KickOff.
"Because, at the moment, certainly the Rwandan international has not produced the goods that we expected from him.
“He is certainly not the goalkeeper we thought he was gonna be, and now Brandon has come in, and he is just not the goalkeeper that we thought he was gonna be either.
"I mean, I know Brandon from Ajax Cape Town," Portugal-born Do Santos added.
"He was a very good goalkeeper coming through the ranks at Ajax and did a fantastic job in the first team. But right now, he is all over the place.
"Bvuma, we haven't seen him for a while now, but after what happened in the last two years at Chiefs, Bvuma should be given another opportunity to claim his place, I think.
"Brandon is not doing it, and the other one is not doing it, so you must as well give Bvuma a chance to come back," he added.
"It's very strange. I don't know what the problem is there. When Bvuma was playing continuously, he made a mistake here and there, but every goalkeeper made a mistake.
"But Bvuma is being replaced by what we thought was going to be a very good signing, the Rwandan international, and he has not produced the goods. He has not risen to the occasion. He is not the man we expected him to be."