Got banned while account was hacked.

Today I logged into my league account to find (in extreme confusion) that I was permanently banned for the use of third party applications. Did some digging and checking, and I saw that there was 4 matches played today. Games as Lucian, Fiora, Corki, and Kayle. I personally never even logged into the client. I didn't even have a working computer since my heatsink broke.

It would be sick if I could be unbanned considering how much money I wasted on skins as a teenager.