The loss of their Pos Shop depends on the hope that the Government can provide a solution in the form of a "regional hub".
Finance Minister Grant Robertson said earlier this week that government support centers for postal and banking facilities were one possibility in response to the NZ Post's plan to close the remaining 79 independent Post stores, and offer them as franchises.
However, the exploration of the idea of a hub is at a very early stage, said a minister's spokesman.
National President Gray Power Mac Welch called the NZ Post decision "truly shocking" and said that the Government needed to step in.
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"I'm really against it. The level of service has been greatly reduced."
In the area, the Coromandel, the Post Shop is "really crowded".
"This is really bullshit. His attitude is profit, luck, luck."
Welch said the decision would greatly affect its members. "Older people are the biggest users of postal services, which greatly affects us.
"I already have members who come to me and say it is tantamount to older oppression."
Craig Waterhouse, from the South Dunedin Business Association, said the decision in June to close Kiwibank and his Post Shop had destroyed many local residents.
"This will have a big impact on the people of Southern Dunedin … You can still have branches in franchise services … but the services they provide are only postal services.
"What we're trying to keep in southern Dunedin is all the other services in the joint branch. You get bill payments and there are lots of other services they provide."
Banking is another problem. Even though one Kiwibank outlet will remain in the city center, not everyone can go there or migrate to online banking, said Waterhouse.
The group started two petitions, one online and the other on paper. Online ones only get around 360 signatures, but the paper has more than 3500.
"That's a big indication of how many people are connected in southern Dunedin. People aren't connected here – they don't get income or willingness to do that, and they can't afford to travel far into the city to use the service."
Waterhouse hopes that the "hub" planned by the city council in southern Dunedin for libraries and other government services will be able to combine PostShop, even though it costs money to buy a franchise.
But a spokesman for the Union of Taxpayers, Louis Houlbrooke, said the financial losses for the NZ post eventually hit taxpayers and had to move with time.
"It is important that services respond to changing consumer trends, even when that means difficult decisions such as closing branches.
"Maintaining 79 individual post offices is the use of inefficient taxpayers' resources, considering that these services can easily be integrated into other businesses. The reduction in the use of postal services must justify a smaller investment from taxpayers."
The NZ Post Plan emerged from a request for an Official Information Act that the Johnsonville Community Association was created to find out the fate of their own post shop.
Association president Simon Pleasants said the NZ Post has a legal obligation to be a good business, good employer and good neighbor.
"They just raised their hands and gave up. Financially it's worth it."
He said places in Europe have adapted to the challenges of physical posts in the contemporary era by utilizing existing postal shop infrastructure.
"They change, not give up."
But the NZ Post spokesman said nothing would happen.
Searching for local business partners such as supermarkets and bookstores can be long, and it can take "months".
"Partnering with local businesses in this way is good for our customers because these local businesses often have longer opening hours than traditional post stores and often are in more convenient locations."