Alamo Review

On Sat, July 18th my friends and I picked up our rental car from Alamo San Jose in Costa Rica. ONE hour into our trip while driving my brakes went completely out the road started to go downhill and we were approaching a curve. The car started to pick up speed and I pulled the emergency brake and NOTHING happened.

I tried to keep the car steady but was forced onto the other side of the road. We hit a truck that was coming the opposite direction. 
We could have all died, there was a cliff that I thought we were going to fly off of if we didn't collide with the truck. The collision was very bad yet the airbags did not go off at all. Alamo left my friends on the mountain for 4 hours while I was rushed to the hospital with a broken wrist. 
Today I received in email from alamo stating that the" brakes were in perfect condition and that they overheated due to overuse because we were going downhill." Can someone please explain to me how this makes ANY sense? I did not overuse the brakes I braked to keep a safe distance from me and the car in front of me and aren't you suppose to brake when going downhill to slow down??? and what happened to the emergency brake? There customer service has been despicable and have shown no concern for what they did to us. 
I am begging you to not use Alamo if you care about your safety and safety of your loved ones.