Trendin.com — Did not receive my refund of 3000 sinse 4 months. Not responding to my mails too

I placed an order on trendin in the month of july. I returned it immediately but one of the products did not reach the warehouse due to some mistake of the logistics. When i did not receive the refund for that product, i wrote back to them and the product has been tracked. Since then i did not receive the refund. Everytime i mail them, they say wait for 3-5 days and its been 4 months now. Last two mails of mine were completely ignored. The order number is 1286365