Brand new XC60 - stone chip already!

[XC60Owner]

I don't know how it happened but my lovely new saville grey XC60 has a chip in the driver door. Right down to the metal. Am really gutted. I've rubbed some wax in the chip whilst I decide what to do (I thought this would prevent any rust). Options are

(a) Leave it
(b) Get some dark coloured wax and put that in the hole every few weeks - am pretty sure it will be invisible if I do that.
(c) Get one of these mobile scratch/chip repair guys out
(d) Get the dealer to repair

Chip is about 2mm by 4mm but in a very visible place next to the door handle. If the car wasn't so new or if it wasn't down to the metal I wouldn't be so bothered but am worried that it will rust if left untreated and that I should deal with it now rather than later.

Any thoughts/warnings/advice appreciated. My local Halfords arranges chip/scratch repairs from £60+ using a local mobile firm. Worth the risk or should I stick with Volvo dealer? Am more concerned about getting a good job than the cost. I just wondered if a specialist guy might be better at this job that a dealer?