Consumer Redressal

Hi, I have purchased Power Bank on 10th Of March 2015. Order No. AB1471597 Which when delivered on 16th March, I that the product is DUPLICATE and also found faulty and dead. I have reported the same immediately by form on their site on the very same date BUT i have never received any update to that email. After that I have called to customer care number and i have been assured for reversed pickup and refund. REf.# QRC198421 To which my reserve pick has been done. I have again called on the customer no and they asked my bank details after that they have told me that i should get call from them about refund confirmation. I have received the confirmation call and they have said refund has been approved and should be credited to my bank account within 7 to 10 working days. After 7 days i have again called to know the status so they told me within 4 days i should get refund. But since 7th of April it has been almost a month and EVERY TIME THEY SAY FOR SOME TECHNICAL REASON IT I