Tradus — Bad service. shipped used product

Address:

Chennai, Tamil Nadu

I had purchased a tab iball Q0703 from tradus and immediately i cancelled the order. later after the item was delivered, i requested for the product to be returned as they have a buyer protection guarantee but despite several communications, for the last 15 days they have not taken any action. on calling the seller, the seller confirmed that he/she was not notified about my concerns and they would not be able to do any thing about the same. Rather they quizzed me that when i received the product on 20th I should have complained within 7 days. Different reference numbers were generated for my queries, with 1417625 being the one for which i got a response. My order id with tradus is 12047025_01 and the seller is sharad electronics from jaipur please educate me on the options available to me