I got attracted with an advertisement that I saw on my Facebook timeline, showing various offers including power banks with 100% cashback and only we have to bear shipping charges(approx 200). I ordered Samsung and Xiomi powerbanks, but I got cheated by them by not getting any cashback and I had to pay 100% money. But I got really angry, when I first used them, the powerbanks were not working, not charging phones more than 5% in 1 time. and the most frustrating thing was that they are not ready to replace the product nor giving the return.