Xiaomi India — k 20 pro

Address:

Flat no. 12, 4th floor, 20/1, BTM 2nd Stage, 560076

I order this phone on aug 5. There was an offer that if i make the payment through icici credit card i will get 1000 rupee off.
When i ordered it for first time, due to gateway error i couldn't place the order... So i place the order again.. This time order was successfully placed. But i didn't get the 1000 rupee off which i suppose to get.
I raise a complaint regarding this so i got the mail from mi that you'll surely get cashback according to terms and conditions. Later on they denied to give me cashback by saying that you placed the order twise and it is one time use... I'm trying to explain them that first order got canceled.. So i should get it on second time.
I'm asking for the money i deserve, please help me here.

Order id: [protected]