Lag from Brazil connection

Hello,

Im whit a lot of lag from my connection.
I already ping server and got ms=240, but in game the ms is over 10k
How can i fix that?

Thank you

I have the same problem here when I try to play in Ragnaros, but with Lordaeron I don't. (Also Brazilian connection)
Later i checked the connection to Deathwing, and it got the same weird 20s latency.

Now using VPN (simulated location: Europe) I'm being able to play normally.