I can not search, enter, select champion or enter the match.

I select any game mode, but when I want to search for the match, the button does not want to be triggered. If the start search button works, when it is to confirm to go the selection of champions, it hangs selected and I will not go to the selection of champions. When I get to go the selection of champions, I can not ban, nor select my champion and the game closes. I'm taking client bans for this, for a problem of it and not because I abandon the selection. I already sent two tickets to Riot but they did not respond. My client hangs to search for match; lock to go to the selection of champions; lock to select the champion. It has simply not been working properly for 3 days. I used the Hextec tool, I reinstalled the game but nothing changed.
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