Server

Australian servers are really lagging at the moment, so I tried to change to New zealand servers. It changes my hideout but when I open a map, it makes me open an australian server map. I would like to know how to fix this

There is nothing that you can do to force a particular server. If any server is at capacity, then your instance will open on the next best one (this is by design so that you can still play).

I am in Australia too - no issues here at the moment. It all depends on the route that your connection uses to get to the GGG servers - different ISPs use different routing. Even routing between states can differ.