swapping skins in champ select

In a game of solo que some members of my team didnt want to get countered so we all opted to pick champs for each other and switch around many times till things where right. everything went well until the game loaded and i realized i was using sand ekko...i do not own any ekko skins and to my knowledge there is no skin boost in ranked ques. talking to my teammates i was using my supps skins as me and him where the last to switch,

i still do not own any ekko skins.