Flipkart — Laptop Return Complaint

Address:

Plot no 36, Nakshatra building,Dr kolthe park co op housing society,near genius school, Khandvenagar, wagholi-412207

I puchased this Laptop from Flipkart the seller is indospirit Pvt limited, Marasandra and madnahatti- venkatpura villages, kasaba Hobli, Malur Taluk, dist-Kolar, Malur, Bangalore, Karnataka, India-563130, IN-KA

the day I received the Laptop the specifications is wrong I ordered a windows 10 Laptop the have given me Windows 11 moreover the Laptop is super slow. I inititaed the return on the same day the flipkart people are only increasing the dates not giving any resolution not taking the Laptop back
my money is stuck my work is stuck they are not responding to emails as well.
The seller contact details also not available please help me with the return process. Please help.