Yikes! Should have bought a Titleist driver.
I had that happen once, on a brand new Tayormade driver many years ago. I took it back to the golf shop I purchased it at, and they replaced it.
I've heard, that with new drivers. If the shaft is gonna break, it will break within a few weeks of use. If it doesn't break within that time period, it will never break. Probably a poor job of installation.
Is that an older model? I thought the new G25s were adjustable.