Consumer Redressal

This is regarding my purchase of a Samsung power bank at shopclues.com. I had purchased the product on 13th and the product was delivered to my security guard on 17th without my permision. After I came back from a business trip to Mumbai on 21st of June in Mumbai,and opened the pack, I found that the cover was totally packed but when I removed the cover, the seal was removed already by the seller and one of the cable was also missing from the item. I called their customer care but they said that I had to inform within 2 days of acceptance. Now they did not hand over to me on the first place and secondly it's their fault that they have given me a fake product. I want to sue this company. Please let me know on what needs to be done.