2013 Dodge Grand Caravan brakes problems

When I bought my vehicle it was okay then when I started driving it more and more I decided that I wanted to stop I felt like it was going to accelerate and stop on its own and it fell as if it was driving by itself I took it back to the dealership and they said there's no problem with it that's the way the vehicle was manufactured but it felt as if it was changing gears on its own and it is a minivan with no stick so I was figuring that there is something really wrong with it after readingthe reviews I come to…

I had my brakes changed in january with 49,000 miles and by june I had to take my van back in and pads were completely gone. So in 10,000 miles I went through brake pads that should of lasted 50,000+ miles. I had all rotors and front pads changed since the back were still good from january and its been 2 weeks now and my brakes are squealing almost constantly when I am braking...not grinding yet but I am sure thats coming soon!