Lag ramping up over time.

So I just started playing on the server today,
I started about 3 hours ago, with about 400ms, I was fine with this as I live in Australia and I'm used to having large ping with WoW.
As time went on and I went further throughout the zone though, my ping kept getting higher and higher, it peaked at 800ms for a while, then 1000 for a while, then 2000. Now its up to 9000.
I have restarted WoW multiple times, haven't got anything using the internet in the background or other people using my internet, and I'm running 100/40mbs internet.
And now its got to the point where if I attack a mob, nothing happens at all. I cannot do anything anymore, its completely unplayable.
I'm not sure what to do to fix this.
I started about 3 hours ago, with about 400ms, I was fine with this as I live in Australia and I'm used to having large ping with WoW.
As time went on and I went further throughout the zone though, my ping kept getting higher and higher, it peaked at 800ms for a while, then 1000 for a while, then 2000. Now its up to 9000.
I have restarted WoW multiple times, haven't got anything using the internet in the background or other people using my internet, and I'm running 100/40mbs internet.
And now its got to the point where if I attack a mob, nothing happens at all. I cannot do anything anymore, its completely unplayable.
I'm not sure what to do to fix this.