2008 Chevrolet Express 1500

The brake system completely failed. the peddle goes to the floor. there is still fluid in the reservoir to proper level but all brakes failed at the same time no stopping ability. had to use parking break to slow and down shift to first gear. This flaw could have killed or injured every passenger/occupant (s) as well as harmed other drivers on roadway/motorway. There should be some type of safety measure to aid in stopping even if a partial failure. But this is a whole system failure. Please advise

WE'VE COMPLAINED NUMEROUS TIMES ABOUT THE BRAKES. AFTER HAVING A COMPLETE BRAKE REHAB ON JULY 7TH, 2017, I EXPERIENCED A COMPLETE BRAKE FAILURE ON FEB. 2ND, 2018 LOSING ALL BRAKES INSTANTLY AS I APPROACHED A 6 LANE INTERSECTION. I CONTACTED THE OWNER OF THE DEALERSHIP BOTH BY PHONE AND EMAIL AND DID NOT RECEIVE ANY RESPONSE. I WAS TOLD THAT A HOSE OR TUBING WAS RUBBING AGAINST THE BRAKE LINES CAUSING AN ABRUPT LOSS OF FLUID? WHY THIS WAS NOT NOTICED DURING THE EARLIER BRAKE WORK SEEMS QUESTIONABLE. MOREOVER, I AM OUT HUNDREDS OF DOLLARS FOLLOWING THE EARLIER BRAKE WORK THAT TOTALED ABOUT ONE THOUSAND DOLLARS JUST 7 MONTHS PREVIOUS. TO THIS DAY THE BRAKES FEEL "MUSHY" AND I HAVE NO CONFIDENCE IN THE WORK DONE TO SOLVE THE PROBLEM.