Sorry to hear that your door has dropped on the hinge / or the front guard has moved back Pete & has damaged the paint.
Firstly - if your car is still under warranty, just take it back to Alfa and get them to sort it for you.
Yes they can be adjusted to get them re-aligned.
If it is a door drop, the drop is usually caused by people leaning on it trying to look cool when the door is open.... if you catch someone doing this to your 4C, feel free to punch them in the face.... same goes for door slammers.
If it's the front guard moving back that's the problem, it should be evident looking at the alignment of the other panels.
You haven't nudged the front on a high kerb / parking stop / speed hump / road-kill at any time? There are soft aluminium brackets that are easy to bend out of shape that will change the edge clearances around the panels.
Any smash repair workshop should be able to do it for you if you don't have the confidence to tweak the panels/ support brackets/hinges &/or the striker plates yourself - you will need a Torx set of Allen keys / socket set and just slacken them enough to gently wiggle the door / panel into better alignment. Don't slacken the screws off too far or the door/panel will drop and you will then need a second person to gently lift it back up while you re-tighten the Torx screws.
I understand that you may not want to trust your Baby to any old smash repairer, so choose one that does top end motors, rather than dodgy brothers smash and grab.
One word of caution, unless you plan on completely removing the panels, don't unscrew the torx screws completely as things you cannot see can fall off into places you will struggle to reach - it's one of those unwritten laws of physics and car DIY.
This car is built around the CF tub Pete, and so just about every panel has been designed to be removed and refitted, so it's probably no big deal. It can be sorted quite easily and with a bit of touch-up you will be able to sleep again at night.
If you aren't confident to tackle it yourself, just pay a professional to do it for you.
Don't let your panel-beater mate with a sledgehammer and grinder anywhere near it.