Hi Ruby Mae Ayliffe,
Thank you for reaching out Microsoft Community. We're sorry for the inconvenience this may have caused.
There are reports about a Surface Laptop 3 that a little crack on the screen begins to appear but this is still under investigation. However, for Surface Book 2, this is basically just the first time I heard of this that the screen gets broken even though it wasn't dropped unless if this was delivered damaged.
In this case, it's best to have it reported to where you have ordered this device because you mentioned that this was purchased not beyond 30 days yet. If this was ordered from our Microsoft Store online, kindly contact the number below for further assistance.
Microsoft Store Sales and Customer Support:
1-877-696-7786
If this answers your question, feel free to mark this post as an answer. Otherwise, don't hesitate to respond to this thread if you still need assistance.
Kind Regards,
Crest_Z