Internet outages have been plaguing a Shellharbour estate for months, according to a resident.
Allan Chaseling lives in the Blackbutt Woods Estate, a 55-home estate off Wattle Road in Flinders.
"It has been playing up and running very slow for months and months," Mr Chaseling said.
He said it had crashed several times in recent weeks. The first time was before Christmas and Telstra got things working again for Christmas Day and Boxing Day.
"Then it went down and they got it back online on New Year's Day and it was running until January 11 and it went down," he said.
He said it was still down earlier this week and he was only able to get back online on Wednesday.
While he might not be online very often, Mr Chaseling said the intermittent service was an issue.
"Mine's only for emails and a little bit of information and maybe to look up something at night.
"But I pay for the service, so I think I'm entitled to get it."
Mr Chaseling said the issue was affecting several people who worked from home and relied on the internet to do business.
This included an international online trader who had to use the internet on his mobile phone when the ADSL connection to his house went down.
Mr Chaseling said the situation was exacerbated because his internet service wasn't with Telstra.
"I'm with Southern Phones, who use the lines from Telstra," he said.
"There are three or four other companies that use the Telstra line, but they won't talk to us and they won't talk to Southern Phones."
A Telstra spokeswoman said the telco was aware of a problem at the estate.
"Telstra acknowledges that there are ongoing network issues around Wattle Road and The Circuit in Shellharbour," she said.
"The issue relates to a known fault within a network element which provides broadband ADSL services for the area."
She said the issue was being investigated by Telstra technicians.
The spokeswoman said that Telstra was "legally required" to provide the same treatment to customers with other suppliers as it did to its own customers.
However, she said people needed to direct inquiries to their own suppliers.
The spokeswoman said the end-user's relationship was with Telstra Wholesale's customer, not with Telstra directly.