Flipkart — Incorrect product delivered and Flipkart is not taking the product back after 1 month of delivery

I had ordered a 14 carat gold ring online during Flipkart sale of size 19 on 28th sept

On 18th Oct, gold ring of size 15 was delivered
I have raised a return request with images of the product and packaging
This was denied
I raised another return request and provided the same images and this time return was approved and pickup was scheduled for 4th Nov
Inspite of multiple follow ups, no one turned up for pickup and my return was cancelled again
On raising another ticket, I am asked to wait again for my return to be approved with no end in sight