Flipkart — Dishwasher

I ordered the Dishwasher but it was not compatible at my house, I raised a return ticket and my return was accepted, I just have to submit the Job Sheet.
After submitting the job sheet, a flipkart agent asked me to resubmit as handwriting was not clear, I even did that.
Now they are saying that they cannot return the product.
I was promised by 3 executives that it will be returned, they can even check the call recordings. I was literally being harassed as I had to talk to 12 or 13 different agents, explaining the issue again and again.
I asked them to share the call recordings or an email as a proof but they declined as it is not there in flipkart policy but I guess it is written in the policy to make fool of the customer and harass them.