Rediff.com India — refund of amount

Address:

530007

Dear sir /madam.
I ordered a flash torch light through rediff but received a the product in non working condition. They arranged for pickup of the same and said they will refund the paid amount to my bank account. They forwarded a link for the same and gave conformation on 24th of january 2019. That with in 4 working days they will refund but failed to do so. And could not able to clear till date. And they are not responding to mails also.