Brake Light On problems of the 2016 Chevrolet Suburban

On July 8 I took my Suburban in for the 30,000 miles service. Everything seemed fine, I drove it the next day. I didn't noticed any problems. On the 10th, I started noticing my brakes didn't want to stop. Also it was like it was rolling back, especially when you were at a slow speed. In the beginning I thought I was overreacting until it kept happening. It was very scary I'm thankful that I didn't hit anyone. Because it was uncontrollable. When I got him I'm on a slight hill & it was rolling as I'm trying to stop it with my brakes. After talking to my advisor after 5 because I was so upset that I just spent 410 dollars on Monday. They said they didn't have any loaners however they were able to accommodate me. I also wonder why they didn't catch this on Monday. I did notice that there was a brake assist light appeared. I definitely feel like this should be a recall on this situation. So my vehicle is at the dealership I don't know any further details yet. Thank you.

Tl-the contact owns a 2016 Chevrolet Suburban. The contact stated that while driving at unknown speeds. The brake pedal was applied but was hard to depress. The brake light was illuminated. The vehicle was taken to the local dealer frank brown 5802 texas 327 spur, lubbock, TX 79424 (806) 853-8770 where diagnosed that the brake pads were rubbing on the rotors. The vehicle was not repaired. The vehicle was taken to an independent mechanic where informed that the brake booster needed to be replaced. The manufacturer was not contact. The failure mileage was 59,969. Ap.