The former Zimbabwean international has not been at training for two weeks according to Harrison, who currently has no knowledge of the striker's whereabouts.
"I don't know the ins and outs of it, these things are between players and the chairman. All I know is that he has not been training with us and I have to plan my team without him," Harrison told the Sowetan.
"It is a big loss for us because he is a top player, but it is not the end of the world. We have other very good players here and we will carry on fighting to stay in the Premier League."
Even though Benjani had signed a month long contract with the club, he has not been attending training and looks set to secure a move to another PSL club, with Bidvest Wits being considered frontrunners to sign the striker.
Meanwhile Chippa United are in desperation mode as they face the prospects of playing in the National First Division next season after a poor start to their playoff campaign.
Mpumalanga Black Aces defeated Chippa 1-0 in their last playoff match and the Chilli Boys are currently on one point from two games. They face Santos in a vital Cape Derby on Sunday.
The club faces an uphill battle without Benjani in their ranks, as he has played an influential role since joining the Chilli Boys earlier this year.
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