Reliance Digital — I want my refund asap

Address:

15-ANAND VIHAR ROAD NUMBER -2, TEKRI MADRI LINK ROAD

I ordered oppo watch from reliance digital online store and i am not satisfied with the product as the product is defective and not working properly i am not at all satisfied with the product.
And now i want to return the order and reliance members are saying we are not refund your amount and all threatening me and try to robbing my money they are not responding and no positive response from other side
please help me to get the refund of mine as soon as possible