RO2 Ultra high ping

Hi, half a year ago, I played RO2 without any problems. But now that I have reinstalled the game, it’s impossible to play on any server because the lag. In the server browser I choose servers below 70 ping. But when I I’m in game, the ping rises to 200-300 reaching peaks of 500 and making the game unplayable.

I have the antivirus disabled, the game priority to high, punkbuster updated etc…

Does someone know how can I fix that?