Could you provide a few pictures or a video? Does it nest correctly when not being used, and only has issues when trying to retract to the resting position? Is this a new issue or has it been going on since you started using the phone?
Thank you for the picture, I can see what you mean. You can try a factory reset to see if that makes any changes to the camera behavior, but more than likely you would need to contact your local repair center. This seems to be a hardware issue, especially if it has been like this since the day you bought it.