Player ran it down mid

Player ran it down mid bot and top to cause me to lose my promos in rank. I believe he or she account should be ban for cause my discomfort fact I place my time to reach a certain point in rank for it to be crumble by a troll i refuse to believe I should be in this position and I should gain another chance to be back in rank as for that person check my match history the Master Yi watch the game, I know riot has the footage and you can see the pain I went through.