Mngonyama is training with Sundowns again after spending the past three seasons on loan at Maritzburg United.
However, the defender is not in coach Pitso Mosimane's plans and is having to bide his time on the sidelines at Chloorkop.
Kwanda's dad Sibongiseni has consequently issued a plea to the Brazilians' management.
"First and foremost I have to thank Mamelodi Sundowns for growing my son to be where he's now," Sibongiseni tells KickOff.com.
"I don't know what is happening and we are still waiting for Sundowns. Every club has its own rules and regulations but my biggest plea is, or what doesn't sit to well with me, is I don't see him playing.
"With that said, I have a plea and it is my wish to see him playing again for any club because I feel warmth seeing him playing in front of other boys.
"I cannot go to Sundowns and do as I'm pleased to do. I speak on the conviction that I see Kwanda is pained and I'm struggling myself. I'm even scared to talk to him because we have no power to do anything.
"I taught Kwanda to be respectful and I haven't heard or see him being disrespectful to others but the situation he's at, it's not good.
"All I wish is to see him play for any other club. I don't go to watch matches and feel happy because for me going to games, especially at Maritzburg United where he was last season, I go and cherish them."
Mngonyama was linked with a permanent move to Maritzburg last term as part of a swap deal involving Deolin Mekoa but it failed to bear fruit, as did Downs' pursuit of Team of Choice defender Brian Onyango.