Amazon India — non supply of item and no refund of money paid online

Address:

Allahabad, Uttar Pradesh, 211006

I have placed order for syska led t5 tube lights on 13th of sept 2018 but till date no supply is done and when i wanted to know the supply status i was told by toll free no that refund have been processed. I contacted on 28th 30th and 4th oct 2018 but same reply is given. My order detail is as follow.
Order no[protected].
Name prem chandra tiwari
72/8puradalel allapur
Allahabad up
211006
[protected]
Email [protected]@gmail.com