Tradus.com — i have received wrong item

Address:

Chennai, Tamil Nadu

Hi, I had paced an order for nexus 7 3g+wifi version but they have delivered me nexu 7 wifi.My order id is 11521471_01. They dont have direct contact number to reach them and they are not responding to our mails.Finally they called and said it cannot be replaced and refunded and he cut the call. The tablet cost is 14700. Please help me to get the refund.