Samsung 20000 — Not working

Address:	Gautam Buddh Nagar, Uttar Pradesh, 20301
Website:	chupchaplelo.com

Hi,
I booked and received a samsung 20000 mah power bank with 6 port usb smart charger etc from chup chap lelo where it came from a dealer named rr enterprises, sector - 63, noida-201301 with tin no.[protected].

But the day 1 when i charged it full which took more than 3 hours and while charging my lenovo mobile which is 3000 mah it charged only upto 40 % and the full power of samsung power bank got over.

Need this to be exchanged or can return the fund of rs.699/-.

Your immediate action will be highly appreciable.