The essential worker told Stuff he did not have insurance and would struggle to pay the repair bill.
"I'm feeling really sad. I'm really exhausted," he said.
The man works in the dairy industry and says his partner is not working after their jobs were cut due to Covid-19.
The pair were struggling financially before the attack on his car over the weekend, with the damage expected to cost more than $1000 to fix.
Police told the Herald they are making inquiries after a person reported the back windscreen of their vehicle was smashed overnight.
The incident took place between 11pm on August 14 and 5.15am on August 15 - overnight Saturday and into the early hours of Sunday.
The day after the attack, the man said he decided to pay the insurance for his car after concerns the men would return to damage it again.
It is thought the man who attacked the car and the other two involved in the assault were at a nearby party at another property in the area.