Nykaa.com — no delivery

My order reached my place long back but have not been delivered to me yet. It has been more than a week. They don't even answer to my complain. I need the order or the refund but they are doing none. Please help. Nykaa has always been so good in terms of delivery i recommended it to my friends also that their delivery is good. Now there might be some problem but atleast they should let me know the problem. I have been waiting for my orders for so long and it's not that it has not reached my place it has reached its destination 4 5 days ago but they are not doing anything or not even letting me know about the problem.