Something incredibly toxic happened to me last game. Help

Last game was one of the worst gaming experiences of my life.

I love this game, but the lee sin and annie in my last game... kept telling me i sucked, that i should kill myself among other terrible things i wont repeat and they kept following me around making sure to steal EVERY single minion so i couldnt get any cs as vayne in the bot lane.

This all started at the BEGINNING of the game...I didnt even have time to be bad or suck - i felt targeted, ganged up on and attacked. It was a terrible feeling. I have played league of legends on and off since the beta, and ive almost never had a game this toxic.

How long until riot usually answers support tickets? I had been struggling with depression in the past and things have been going really well - to hear something so intentional and viscous as this really hurts though, i feel demoralized to not even play the game anymore today.

Thanks for any help or support!