Reliance Jio Infocomm — non working of jio phone

Address:

444005

I've purchased jio phone online & issued me on 08 feb.2018, after the working of three months, its stopped working. On screen it is shows only "jio deigital life" again & again. I've contact the jio shop, where i pick up it, the officials refused to replace.
Therefore it requested to ruefund the paid amount or to replace it into a new.
Details of non working jio phone are as under -
Model : f61f
Rsn : rmpfzkdf0848837
Imei : [protected].