Paytm — paytm fake call

Today i got a call of one paytm representative from the number +[protected]. They informed me about my some past paytm order and told that my number is being selected as one among 10 lucky customers who will get one gift from 4 items they provided. But to redeem the offer i have shop from paytm worth 3000. I selected one and added the items into the cart. They asked giftcode and completed the transaction from their end. Till now i havent recieved any invoice mail or message for my order confirmation, order tracking status.
Guys please be aware of this call from paytm.