Threatened that my account will be banned and that he will sell it to a kid

So it all started when i played a normal draft game. Ahri was free to play so i decided to try her out. One of our teammates was afk so i had to switch lane now and then. And i died alot beacause of that. Then there a sivir who starts to flame. She said stop feeding and everytime she died she wrote ''hax'' on all chat. She said she will report enemy team because of hacks. I told him/her that you cant hack on lol and then she started flaming more. At the end of the game for the stats room she said come 1v1. I said ok. I played talon and she played zed. I killed him/herher many times and everytime i killed the threatened me and said that she will hack my account and she will unrank it. I know that she can't do it but i post this because she flamed so much. I have pictures on when she says she will hack my account. When i told him/her i will post this on lol community she went afk. And i ended the game. Please rank ban this account or something else bad. I have played with toxic player before but this was another lvl. As i said before i got pictures on what she wrote but i don't know how to upload them. If someone could tell me how to upload the pictures, i will do it immedietly. Thank you for reading this post bye.