Portronics — refusing for exchanging or remuneration however product is under warranty

Address:

51, khurbura, Dehradun-248001, Dehradun, Uttarakhand, 248001

I bought the 'portronics indo 10s power bank ' from a shop in dehradun, the powerbank is replaced once within one month, but the new powerbank also creating problem so the dealer retused me to exchange or remunerate for the product however the product claims 1yr. Warranty infact from first buy.
So please i request you, either replace the product or refund me.