Indiaplaza
Payment made but item not received

I have purchase a mobile from the site indiaplaza.in on Feb.2 vide Order Number :020220100504, I have made the payment through my credit card, payment has been debited to my account, but still i haven't got the consignment nor they are refunding, Delivery time was assured i.e. it should be a week time, but now the month has been over, they are not responding nor they are taking any action, what should i do.