i got banned cuz somone gotten into my acount and played on it '' i need a riot memeber help''

I believe someone gotten into my acount and played a ranked game and banned me internationally... cuz if you check you'll find my all my loot is gone and he/she used it to buy a rune page ''like seriously'' Can you please reply with an answer and fast... i don't wanna miss the project missions please Riot help me. Like time reverse on the account or something and btw this happend before with a skins reroll