Jiomart — Order did not receive or wrong product delivered

Website:

www.jiomart.com

Hi Team,
I have ordered Clovia night suit from Jiomart on 5th July 2022, on 10th I have received parcel, but to my surprise when I opened the parcel what I see is that the seller has sent me wood piece. I have raised many complaints to jiomart about this but no action from their side whenever I raise complaint it is marked as resolved without any resolution. Now I do not product neither they are giving me refund for the same.
what should I do ?please help.