Doesn't sound like there is much you can do but return it.
I was disappointed when I got my first one as the controller wouldn't bind with the AC. A quick chat with DJI Support confirmed that I either had to send it in to them or return it to the place of purchase. I chose the second option and...
Hey Dave, if you have any shots from around Manly, I'd love to see them. I grew up there but haven't been back in many years. I bet the place has changed a lot.
I recommend you upload your flight logs by following the instructions on DJI Flight Log Viewer | Phantom Help
There are a few people on the forum that are very good at interpreting what happened and where to start looking.