Login problem (help a gamer out)

Hi guys. I have this incredibly annoying problem when logging in. When i try logging in the following notification appears: "An unexpected error occured while logging in. Please try again. If this issue persists, contact support at support.riotgames.com". it has been happening constantly for a few days, and i have not been able to log in. I checked my internet connection, and it is fine, i have no problems playing other online games. Also, i double checked my username, password and region, everything is correct and that is why im posting this. I tried using the repair tool riot made, and reinstalling the game - nothing seems to work. Not very cash money, pls help.
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