Gutted for you Raj - happened to me with my last car, a Boxster. Got the boot keyed on my drive and masala souce all over it. Normal Friday night scrotes walking past. Did my head in for a while and I wanted nothing better than to catch them in the act. Got if fixed good as new and have forgot all about it since. I threatened to get CCTV to cover the front of my house but never did. Touch wood, no other trouble since, although several cars have recently been keyed in the area since. These things seem to happen in cycles. Make sure you report it to the police as they may catch the barstewards in the future. It definately looks like a kick to the door panel and from my own exoerience with paintless dent removal companies, that looks like it may come out without any further correction, as long as the paint is unbroken. If not, as TT says, the door skin is easy enough for the dealer bodyshop to replace (though not cheap). Hopefully, the former.
Keep the faith, get it fixed and don't park it there overnight again unless you have to. Like the result from chrissyr32 - good plan and a good result. May be difficult to do this if it was just the usual drunken scrotes wandering on their way home though.
Get back driving asap and put the smile back

Cass