So on my holidays in Korea I bought a laptop and used it for the remainder of my holidays getting good internet speed. Then when I get back home to Australia, the laptop is insanely slow while my phone and computer are getting relatively good speeds. Anyone know why?
You may want to try testing the speed through another browser and see if it is better. If that is the case, the browser you are using may be dragged down by add ons, cookies, cache size, etc.
Also, you should be able to log into the modem itself (can't say how, depends on the carrier and if you own or rent the modem) and check the speed that way. If it is still bad (even in there) then I would be calling your ISP and making them fix it.