Flipkart — Flipkart wishmaster or delivery boy is not accepting my return

Address:

Stanza living Paris House Boys hostel, Knowledge Park 1, Greater Noida, UP

I have been shopping on Flipkart scens 5 to 6 years.
I have trusted Flipkart with the right delivery of product with assured delevery, but i am disappointed because they sent me the wrong product and the wishmaster is not even taking the return order.

I ordered a Laptop Ram "hynix-pc4-2666v-1rx8-ddr4-8-gb-single-channel-laptop-hma81gs6jjr8n-vk"
But i got the different model of korean version ram.

I got the wrong model which is not supported by my laptop, so i filed a complaint regarding this issue to customer care and the return for this product was initiated.
But when the delivery boy or also known as so called wishmaster came but he is not accepting the return even when everything is intact and bill is also there, but he is not taking my product for return saying he can't take this product because he didn't get the confirmation email from Flipkart, this is strange because if he didn't get the confirmation then why is he coming to pickup the order and this happened two times now i complained again and again to customer care and they raised my complaint but the wishmaster is not picking up my return order.