No rating points, why?

I won my match against a higher rated player yet received no rating points, why? I see though that they had a note against their username "This account violated the Lichess Terms of Service". I s that the reason?

Looks like your opponent got banned during the game, and yes this is the reason why the ratings did not change. It also explains why you won in the first place: when somebody receives a ToS mark, all their ongoing games are automatically resigned (and unrated).

Thank you zwenna