Myntra.com — non acceptance of return for ordered product

Address: Myntra Designs Pvt. Ltd., AKR Tech Park, B Block, Krishna Reddy Industrial Area, 7th Mile, Kudlu Gate, 560068

I have ordered a few products from myntra website on 22.06.2019 during their sale season and received them after the sale was over. However, i realised one of the products (Order no.[protected]-2462601) didn't fit me well and while trying to return the same a message popped-up saying 'since you have redeemed the insider points you are not allowed to return/exchange it anymore'. I dont even know about these points and while trying to contact the customer care for help, they turned a blind eye saying there is no option of cancelling the points and hence they cannot accept the return. Since the product costed me around rs.1900/- and is of no use to me anymore kindly help me out with a way forward in getting it returned.
Regards
Sonali