[Resolved]  Poorvika Mobiles — Conekt Power bank

Hi I have purchased conekt power bank in poorvika East tambaram yesterday evening I have used it but charging speed is very slow in my four mobiles so I went to the shop for this they are saying it's charging correctly in their mobiles I said it's giving problem for me so I said I will exchange this but they are saying there is no exchange for this once sold that's it this is how u treat the customer what I will do with this power bank without working I need a solution for this or else I have to file a case against this I am not asking return of money I will get different product for this pls respond earliest