LeaverBuster cuz client lag/crash

I started the game of ranked and when i was about to go in loading screen my client lagged out crashed, but the game started anyways. And since my computer isn't the best the crash caused the entire computer to freeze so i had to restart it. I restarted it and launched league asap and when i was about to log in i realised that the server changed to NA for no reason and my client started patching. It wasn't just a thing in the top left corner where it shows you the percentage of the files downloaded, it opened a new small window and it started donwloading more than one update(i think but doesn't matter anyways) and while i managed to close that and get onto my account my team slready remaked, so now i basicly lost LP and have LeaverBuster because of client lag.