Car brake problems

Was the brake pedal pressed as the lines were bled?

Got a two year old Kid Ceed GTLine with 28,000 kilometers on the clock. Last week whilst approaching a roundabout at 80kph the brake pedal went soft and went straight to the floor. Pumped the pedal and good job the wife had seatbelt on or she was through the windscreen. No warning, no abs lights on dash. Fluid levels etc all ok. The car has developed this intermittent brake failure and it is clearly very dangerous. Car with the main agent garage for the past week. They acknowledge the fault but can't find the cause! I have told them that it is not the MC as seals don't repair themselves. It is not an air issue so it has to be electrical. They tell me they have never had this issue before but forums clearly demonstrate that this is a not uncommon problem with Kia. There is clearly a manufacturing fault with these cars and it's not the first recall Kia have had over faulty brakes. I'm refusing to take the car back until they can assure me of what caused this brake failure and an assurance that it won't happen again. My insurance company will invalidate my insurance if they know I am driving a car with a known brake failure fault.

Avoid Kia Soul I test drove 19K mile black 1.6L Base I told the salesman while driving my foot is to the floor stopping this piece of shit. U turned back to Dealership asked what I thought I said no brakes..so he said if we adjust which you can’t you gotta rebuild from the vacuum Servo(booster) then bled lines take caliper apart and still won’t be fix they need to get shit together,, by the way this is my second and third test drive with no brakes other one was Soul exclaim and tried a Soul plus all soft put foot down 3/4 way to stop they need Toyota or Honda to borrow their technology on proper braking..My 2013 Kia Base had no problems but then again I dumped the car at 53K miles before the big Millions recall of fires and stalling...So stay away from these...