Consumer Redressal

Dear sir/madam, I have purchase a xioami powerbank 10400mah from the E-commerce site rediff.com. i ordered for it on 16 feb 2015 and i got it on 22 feb at 2:00 pm at cash on delivery of 569.but when i opened it i found that the power bank case was broken and when we take out the power bank from it the USB port of the product was broken. the i called the customer service they advised me to put a mail for it, we will replace the product,then i mail him.the same day at evening i got mail from that side. they asked me to send the picture of the product and packaging case.i send him at the same day at night.after that they did not contacted me and never replied my mail, many times i asked him for the replacement of the product.they ignored my request. so i request you to please contacted him and asked him to replace my product or revert back my money.and advised him to improve there service.details of the product given below: order no:11187633 product details: DLF15021 MI POWER BANK 104