3N-1-3N-1-3 is an illegal formation since it has no wingers. It will only give you 20% possesion.

Against 4-3W-1-2 I would play 4-1-2N-1-2. Red arrows on both full backs. Optional red arrows on DMC and AMC, but against that system I would not set them (AMC is uncovered, he has an AMC that should be covered by you).
Tactical setup: attacking mentality, passing through the center, short passing, zonal marking, own half pressing, normal tackling.

Turning around a 0-4 loss is not easy, so good luck.