Jio — jiofi device

On 4th nov, 2018 i had bought a jiofi device and a connection from reliance digital, axis mall, newtown, kolkata.in jan 2019 it suddenly stopped working. I went to the store and they told me to get it checked in service centre which is on the same floor in the mall. Service centre people worked on it and it was working fine. Now today on 3rd feb, 2019 the device has stopped working again.
This is very frustrating. I can not visit service centre every month. I want this device to be replaced on urgent basis.
Also this is my 2nd item purchase from the reliance digital store in axis mall.in both the cases the products (1st one was a mobile phone) are of poor quality and stopped working in the 1st/2nd month from the time of purchase.
Please help me to get my jiofi device replaced with a new and good one on urgent basis.