Pantel Technology/ T Pad Is703C — NON DELIVERY AFTER 2 MONTH OF PAYMENT

I had booked a pantel tablet from M/S Pantel technology ltd I made a payment on 3rd of August but now its Two month its is not being delivered, every time i call the customer care they say it will be deliver next week, this goes in every time i call them, and at last i asked them to refund back the amount they say that they will call and mail me, but they never call nor mail me back .