Well, here are a few things-
1) Put it on facebook also on their page.
2) Give them a solid ripping at all online boards like tripadvisor that you can find.
3) If you want to really, truly fuck them, register a case with consumer court. Indian consumer courts are very vigilant and they will make it worth your while by ass fucking Lalit resort.
In most cases merely the mention of filing a case in consumer court gets them at your feet.
I really feel for you. I know how it feels to pay through the nose and still get treated like shit.