Police from Bedfordview were tracking kidnappers and mistook Chana's luxury sedan to be that of the kidnappers, said spokesman Lt-Col Lungelo Dlamini in a statement.
"It is alleged that as they [police] were trying to stop the vehicle, it drove away at a high speed, several shots were fired and the driver lost control... it was established that the driver had sustained gunshot wounds," said Dlamini.
The incident took place at the Caltex garage along the N1 highway in Midrand.
A case of kidnapping was reported in Bedfordview and the kidnappers demanded a ransom from the victim's family, Dlamini said.
"The family of the victim was instructed to drop the ransom money at the Caltex garage."
Bedfordview police arrived at the garage and saw Chana's vehicle, mistaking him for the kidnapper.
An internal investigation regarding the incident was being conducted, Dlamini said.
Chana, whose real name is Khulane Morule, was discharged from hospital but left shaken by the incident, his publicist Sheila Afari said.
"He is shaken by the shooting as it came out of nowhere and there was no warning from the police whatsoever. He is recovering at home."