Account Hacked, then permabanned. I came back today to see this...

Hello there fellow players. I came back to retry LOL for once, and I found my password changed, and after resetting my password, I find out it was pemabanned for toxicity. I left the game around 2015, and never came back... What should I do? I already submitted a Ticket to riot, and am now waiting.

Also, Here's the Toxicity chat, where the hacker even says he is moving to the second account:

In-Game iVipper: damn iVipper: this riven failed all iVipper: and killed me iVipper: come top iVipper: im d3 smurf tho iVipper: wjhat is ur prob ahahah iVipper: hardstuck gold ? iVipper: dude i even picked mundo iVipper: and was 1-212 last game iVipper: p4 47% r iVipper: ye twitch iVipper: anyways twitch 47% winrate iVipper: see iVipper: ill show u how iVipper: im only having 70% wr and not 90 iVipper: im afk since now and make you lose this game iVipper: cya hardstuck iVipper: on ur way 46% winrate tho iVipper: ye ofc iVipper: :) iVipper: lose iVipper: :) iVipper: :) iVipper: lose iVipper: :) iVipper: wastr ur time tho iVipper: whatever iVipper: i go on second account iVipper: cya