Yeah, it really sucks to loose against such an illegal formation.
In my last seasons league there was a player, who also collected points despite playing illegal formations. The trick of these people is to bunker themselves in front of their goal, activating "counter attacks" and choosing "long balls".
Nordeus can defend themselves with quoting Almeria - Barca some seasons ago, where Almeria parked the bus and treated Barca with their counters (they also only had 3 men in the opponents half), but 0-3 is simple harsh. Nordeus should consider to fix it.