@Riot Recently i took the wrong runes in a game and team accused me of soft griefing? am I griefing

Recently I was playing ranked and I was placed mid a role I don't normally play I ask for adc and the duo bot decline I respectfully start to set up runes for taliyah my go-to character when placed mid i quickly changed my runes to electrocute. The queue dodged and I was placed bot selecting my character without a clue to change my runes I went into the game with electrocute as Jinx. We didn't tkae the smartest of fights and after dieing I came back to lane to freeze the lane not knowing the vision from bush to bush was in the fog and as I was killing the minions the enemies ambushed me. Shortly after that my teammate said I was griefing. Am I griefing? Im really concerned because I don't want to be banned for something I made a total mistake on. Thank you for your time