Citibank — credit card emi issue

Hello team,
I buyed one product of worth rs 42, 000 on citi bank credit card but did not clicked on emi in 2018 feb month. So, every month i use to get the message of deduction of 2000 rs and above.
I thought this is my emi deduction so every month i use to pay 2000 k and above to citi for continues 1 year feb 2019.
Then, after 1 year i checked the emi were as it is and then i called citi bank customer care they told me that this is minimum due every month they use to debit from my account. So, this worst case that citi don't care about their customers.
I was not aware that the amount deducted was not an emi and for continues 1 year i paid the amount which was free to citi bank.
Then they told me to pay whole credit card amount of 40, 000 in one shot and this is horrible for me.
So, citi bank did not called me or informed that, no emi is been paid they just took free amount of rs 25, 000 from me for 1 year.
It was there responsibility as well to inform that the amount deducted is not an emi it's a minimum due which they took from me free.
People who are not aware about such deduction what they should do.. Citibank is fooling them.
I am very much disappointed from citi bank and i want my free money deducted back of rs 25, 000.

Citibank you are fooling people and charging extra money without information through mails or calls.
You are fooling people with extra charges with no information.