Q: Macbook Pro 15in Retina Turns Off Randomly

My Macbook was purchased late 2014 brand new in the Apple Store. For months now it's been turning off randomly on its own. Once it does it once then the pattern will occur for however long it feels as it needs to. I would literally find myself turning my laptop back on every minute because it keeps on powering down. It also erases my current projects that I have been working on, even wipes my internet history. I bought it to the Apple store while it was still under warranty and they said they could not fix it. This is really pathetic and I'm so upset that the company will not stand behind its products. Especially with the fact that Apple is one of the biggest companies in the world and their laptops are NOT close to cheap. Does anyone know anything I can do about this? Maybe send it to a Third Party Apple Repair Shop?