Tatacliq — Deliver old product

Website:

Tatacliq.com

Hi there i Riddhish Parekh would like to inform you that i ordered 1ton split ac from tatacliq and they're sending a 18mnths Old product for that i complained abt 5 to 6 times at customer care bt thare is no response from there so i raise my complaint to there senior authorities bt there r said that they raised my complaint to there large appliances department for resolution so i hve to wait for 2 to 3 days to get resolution bt still now i m waiting for their reply i talked same thing almost 5 to 6 different senior authorities they all answered same i harresd from last 3 months bcoz they not taking any action right now i ready to give their product back bt they are not refund my money back for that they said it takes 5 to6 working days to process my refund so how can i trust them.
I hope yr department help me to resolve my problem. I attach photo for yr reference