Michael Holding and Kevin Pietersen on Friday slammed Kagiso Rabada for repeating same mistakes which led to his ban in the fourth and final Test at the Wanderers.
Both former international cricketers maintained that Rabada had let his team down once again.
Rabada had pleaded guilty to a level one breach of the ICC’s code of conduct. The incident occurred when he had rattled Root’s stumps and then charged down the pitch, before screaming in celebration within touching distance of the England captain.
He was docked 15 percent of his match fee and handed one demerit point, which in total made it his fourth demerit point in a 24-month period, leading to one match suspension.
"He has to learn," said Holding, who was commentating for SuperSport.
"You can't keep making the same mistakes. He has to remember he is damaging his team. South Africa without Rabada at the Wanderers – that's a big blow."
Kevin Pietersen said the way Rabada got close to batsmen in their personal space was unacceptable.
"He shouldn't be celebrating in a batsman's personal space," he said.
Pietersen added that Rabada had shown similar sort of behavior when he got the better of Zak Crawley in the second Test at Newlands.
"I feel sorry for (South African captain) Faf du Plessis and (coach) Mark Boucher," said Pietersen. "South Africa are going to miss their strike bowler at the Wanderers."
One of his previous offences came at the similar venue, where he had made shoulder contact with Steven Smith in 2018.