The 30-year-old former Platinum Stars and Tshakuma Tsha Madzivhandila man had signed a short-term contract until the end of the season.
That was after impressing former coach Julius Dube at training, but the arrival of Clinton Larsen saw his stay with struggling Bizana end.
In March, Golden Arrows head coach Mandla Ncikazi revealed he wanted to sign the talented winger for the DStv Premiership club but Zongo failed to arrive.
According to an insider at Chiefs, it has been weeks since Zongo last trained with the squad.
"No one really knows the real story about Zongo my friend," a source tells snl24.com/kickoff.
"He is no longer coming to training. I think it has been a month now since we last saw him."
Bizana coach Larsen could not be reached for comment.