Flipkart — They are not doing refund or replace the product

Dear sir/madam
I ordered a marble cutter machine on 16/08/2020. and i received it on 20/08/2020 I have paid amount on COD. But the product is not that which i ordered. they sent me wrong company's machine.
I ordered I Bell company's machine and they sent me Maxima company's machine. From 20/08/2020 I request for a complaint regularly but daily they give me a new date for further process. They asking me for PAN card, Aadhar Card i give them all but after that they not refund my money or even not replace my product. after 10 days i got very upset. so kindly file a case against them that they refund my amount as soon as possible. this machine stalled my work.
Date of machine ordered :- 16/08/2020
Date of machine COD :- 20/08/2020
Date of payment on COD :- 20/08/2020
My name :- Sanjeev Shrivastava
My email id :- [protected]@gmail.com
My Mobile no. :- [protected]
Flipkart Contact no. ;- [protected]