Pentakill Mordekaiser :/

I love pentakill mordekaiser i bought him when he first came out, i never thought he needed a VU xD i dont wanna argue if he is cooler or worse since they changed him but sadly i dont like him and beacuse i bought him a long time ago i cant even refund him :/ is there a way to refund him after a long time? otherwise its lame to be stuck with a skin u dont like and that was diffrent when u originally bought it. So maybe make refund available for reworked skins/champs? even after a long time