Paytm Mobile Solutions — Product not which i ordered and id defective

Address:	Chandigarh, Punjab, 160023
Website:	paytm

I ordered a wall clock from paytm . but when i opened my package it was not the clock i ordered and is not even working . what do i do ? i paid online through my debit card. i simply want the concerned authorities to either replace the clock or refund my money . i am not satisfied with the order and it is not even working.