SOMEONE PLEASE HELP

OK, SO FOR THE PAST WEEK I'VE BEEN ON A TRIP TO L.A TO VISIT MY GRANDPARENTS FOR THANKSGIVING WITHOUT MY LAPTOP. AFTER RETURNING I LOG ON TO LEAGUE OF LEGENDS AND RECEIVE THE MESSAGE THAT I'VE BEEN BANNED FOR 14 DAYS. IN MY CONFUSION, I CHECKED THE WORDS THAT GOT ME BANNED AND IT SHOWS BEHAVIOR I WOULD NEVER SHOW IN NORMALS. I CHECKED MY MATCH HISTORY TO SEE A BUNCH OF MATCHES PLAYED OVER THIS WEEK WHEN I'M NOT EVEN ACTIVE. A LOT OF THEM BEING TRYNDAMERE -I DON'T EVEN LIKE TRYNDAMERE- . COMING ONTO THE FORUMS I NOW SEE SOMEONE POSING AS ME, TELLING RIOT GAMES TO PERMABAN ME. EVEN GOING AS FAR AS SENDING A TICKET TO RIOT GAMES FOR A PERMABAN. THEY SAY "MY DOG DIED AND IT'S HARD TO GET HAPPY" I DON'T EVEN OWN A DOG! SOMEONE HACKED MY ACCOUNT AND RUINED ALL PROGRESS I MADE TRYING TO BE AS NICE AS I CAN IN MATCHES -IT TOOK MONTHS JUST TO BECOME HONOR 4- NOW, I CAN'T GET FREE REWARDS ANYMORE NOR CAN I PLAY LEAGUE FOR 2 WEEKS. CAN SOMEONE PLEASE HELP ME? I AM GENUINELY FRIGHTENED.