league client resolution wont change from 1024 x 756

help the pvp client resolution wont change ive tried everything resolution wont change from 1024 x 756 ive looked at every post relating to it and nothing ive tried accessing the game config ive tried the ctrl + and changing the resolution outside the game i cant do this my pc doesnt run lol well above 1280 resolution and im stuck having an oversized client im trying to return to a game ive loved and ive spent almost $1000 on this game over 7 seasons and if i cant get a fix ima go back to xbox lol im so desperate