Enormous oil loss, despite replenishment

Hello I’ve been having the following problem for a week: After about 15-20 minutes drive the oil lights (Display & Icon) lighted up with me last week. As far as no problem, I replenished oil, but the lamp lit again after a short time…so again something poured in…again the same game. Then I brought them to ATU (yes, I know… but it was the closest thing with me & I didn’t dare to drive with it anymore because the lamp was red). They thought they had completely filled up oil, it could not have been in it any more (maybe it didn’t have to be oil loss) Now 3 days after I picked it up, the lamp goes on again when the car went warm (but only on the board computer display, not the icon) But it’s NOT oil spots on the road or so… do you know what that can be? I drive a Honda Jazz built in 2017