Haven't played the game since 2 months because

It doesn't let me connect, not even to login screen. I talked to the support for 2 months for NOTHING. It alwas says update failed etc, i can't start neither log in to the game. Every other online game works JUST League of Legends not. And i have no damn idea why that is. Even after talking with the support for 2 months. Please someone ACTUALLY help me already i tried everything
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