Flipkart — Seller doesn't accept the return request

I ordered a smart phone which is Redmi Note 11,
After 𝚝𝚑𝚊𝚝 𝚠𝚑𝚎𝚗 𝚠𝚎 𝚞𝚜𝚎 the phone, there is performance issue in the phone (getting on and off continuously itself).
Technician never visit at my address due to which 4 times return request has been cancelled. And technician gave feedback to flipkart that I wasn't response..oopps. How a shameful.
I'm continue trying to contact with the customer support services but we haven't got any response from flipkart.

𝙸'𝚖 𝚊𝚕𝚛𝚎𝚊𝚍𝚢 𝚠𝚊𝚒𝚝𝚒𝚗𝚐 𝚏𝚘𝚛 𝚊 𝚟𝚎𝚛𝚢 𝚕𝚘𝚗𝚐 𝚝𝚒𝚖𝚎 (2month).

𝙿𝚕𝚎𝚊𝚜𝚎 𝚌𝚊𝚕𝚕 𝚖𝚎 𝚋𝚊𝚌𝚔 𝚊𝚜 𝚜𝚘𝚘𝚗 𝚊𝚜 𝚙𝚘𝚜𝚜𝚒𝚋𝚕𝚎 𝚊𝚗𝚍 𝚑𝚎𝚕𝚙 𝚖𝚎.
Register Mo. No. - [protected]
Order I'd- OD[protected].