i tried to use the vpn chnage location and now i cant get canada off my australian information. how to take canada off

I was trying to get rid of the cache of things slowing my mac laptop down. During this I turned on the VPN which said choose a country...i chose canada. now everything i do has canada on it. my searches that used to be for australia are all in cnada, my imgae on the internet has been replaced by a canadian, my weather wont let me look up St Kilda, Victoria Australia...it just takes me straight to toronto. This is a nightmare and making my searches mind blowingly long and stupid. how can i get rid of canada from my system!! please. i am desperate