Drywall and vapor barrier done differently

I have it from mid-January. It was agreed that the GU (butcher) would dismantle the drywall to save costs. I thought to myself, he can't do anything wrong there. I arrive at the construction site and see Sascha from Ukraine (without any knowledge of German) applying putty. I also told the GU my opinion about it by phone last night, with the result that he called in sick today. And what am I supposed to do now with the unprimed but already puttied concrete ceilings.