I just played a comp game in Korea?!

Im in eu. never have Ping issue or other problems. I noticed korean names but sometimes someone has that on eu servers as well. But this time they talked korean and it was like 4 korean names. Then I noticed my ping, 300 PING! Wtf?!!!! I never had this. Randomly my comp game was in korea. And I won lol. But wtf im so confused. Now im scared something happened to my account