Brake replacement – now hardly any braking effect

Today I took my car out of the workshop, a familiar VW specialist. The front brakes and discs were replaced. I noticed at the first meters that brake pedal could be kicked very far and was very soft. I came up to the bottom sheet. So a few more tests were made. From about 30 km/h I can brake so strongly that the ABS jumps in. Then again to the workshop and the whole demonstration. Answer of the master: They still slow down and then also the pedal path gets shorter. Air can not be in the system, then it would not brake at all. So back home, after about 25 KM downtown. On the highway then stood the sweat beads on my forehead. At 160 Km/h jmd pulls over from the right lane. So I on the brake. And there is also not only a delay in the approach as I knew it. I was only a few meters away from a driving accident. I now drove about 120 KM and still have a soft pedal. Well, my questions can’t take you long as it takes time to have a tire?