Unless you have bodyshop experience and as your car is quite new go to a good local bodyshop/panel repair outlet.
If the dent is not too big try
www.dentdevils.co.uk
Maurice
September 2009
I can answer this question...
How can I panel beat my 2009 nissan micra door out?
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.