HDFC Bank — No cost emi - interest rate

Hi team,

I ordered one laptop in Flipkart via hdfc credit card nocost emi,

I found another good offer from another product so i cancelled the order. After same day
amount is credited to my credit card,

But bank side Nocost emi loan is not closed, i thought it will close automatically while cancelling the order.

Then i went to hdfc mycards and apply the pre closure,

Now i need to pay intrest amount 4066 for laptop didn't buy.

Please help me out
Name: Muthu kumar

Thanks