My main got hacked what can I do about it?

It can take several days for them to get to your ticket depending on how big the queue is, and several more to process an account recovery. Just be patient, and don't bump your ticket with replies unless you absolutely have to, because it'll be pushed to the back of the queue each time.

Don't worry! Lots of stuff is happening but Riot will get back to you as soon as they can. They usually don't reply until they have something they can reply with, like a solution. Just because you haven't gotten a response doesn't mean they aren't working on your issue. And if you got hacked and RP was spent without your permission, I'm sure you can issue a complaint to Riot and they will respond accordingly. That sucks that that's happened to you, but measures will be taken to be sure you get your account (and all that schwifty RP) back into the correct hands.