Magicpin — Voucher expired without redemption. Need refund

I have purchased a voucher with expiry of 15days but unable to use it nor refund it in time. I put a request to refund it but denied. Is It legal to sell voucher in India now as no services is provided in return?
I put a request to refund it in 2 days. They have refunded the voucher in the past for same action but this is the exception.