20 minute ban

I got a 20 minute restriction for 5 games for leaving 2 games in a row, but on my side of the story i didn't want to leave them, i couldn't start the game at all, it loaded to 60% and then i had to wait for like 10 minutes untill it got to 100% and i get into the game, then everything worked fine,my internet speed was fine, all files are there i honestly don't know what is the problem. Last 2 games my team surrendered at aboud 3 minutes into the game smth like that and i got banned. Can i even ask to be unbaned?
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