Miraculously, no one was killed in the incident but two people were left injured, police say.
The incident happened at the Engen Quick Shop in Walter Sisulu Road in Khayelitsha on Saturday just before 8pm.
There were several men and women in the store at the time.
Video footage of the incident from inside the store shows the taxi crashing through the front and hitting two customers.
A woman who had just left the store and a man on his way out at the door are violently struck by the Toyota Quantum van, both of them slammed into fridges inside the shop.
The minibus narrowly misses several other shoppers.
Shocked shoppers can be seen scattering and running outside.
The driver looks dazed and confused and gets out of the van, before helping out an elderly female passenger.
The results of a drunk driver.— SALTruckers (@SALTruckers) November 4, 2018
A taxi driver drove into the Quick Shop of the Engen Garage in Khayelitsha. pic.twitter.com/NmMw76RLmT
Police were called to the scene immediately, store manager Michael Davids said on Sunday.
“Half of one wall is completely knocked out and the canopy might have to come off as it appears to be too damaged,” said Davids, who was overseeing repair work.
“From what we know, the driver was not drunk. He had filled up on the tanks and when he restarted his van, there was some sort of malfunction.
“The accelerator and the clutch were damaged and he just went flying through the shop.
“He knocked over two of our customers, but we believe it was an accident. It was so quick and violent.”
Davids says the store is closed for business.
“We have security officers and dogs on duty to guard the store. We cannot trade right now, but hope to get things sorted out as soon as possible.”
Police spokesperson Sergeant Noloyiso Rwexana confirms police are investigating the accident.
“A case of reckless and negligent driving has been opened for investigation with no arrest at this stage,” she said.