Karthus Bot account Hacked

So for a few years my summoner name was Karthus Bot. Last week I logged in and found that my name was changed, all my blue essence was spent, most of my friends had been blocked, and a random chat history of people I never had added was suddenly there. I sent a message to support and nothing was done, I'm guessing it was because I still had access to my account. I'm still pretty upset that I lost the summoner name that I was proud to have for so many years, if you look up Karthus Bot now you'll see the account is new. Not sure what Riot can do here, if anything, but it just really stinks. Obviously I dropped some cash to change back to the closest thing possible...which is The Karthus Bot....still doesn't feel the same.