Citibank — Misguiding of the customer executive regarding my query

Address:	560070
Website:	www.online.citibank.co.in

I received my credit card of CITI BANK in November 2016. And did shopping with my card in the same month of the amount Rs.82000.
When my bill generated in December 2016 with due amount of Rs.82000, minimum due Rs.4100 and due date of 14.12.2016. I called Customer Care on 03.12.2016 for the confirmation regarding how they charge for the interest and other charges. He confirmed that there are no charges if you pay minimum amount which is mentioned in the statement i.e. Rs.4100 but make sure the amount must be credited in your card before the due date i.e. 14.12.2016. After confirming with the executive i paid the amount of Rs.30000 which got credited on 07.12.2016. Again on 24.12.2016 i received a message stating your outstanding balance is Rs.55759.49 with minimum due Rs.4279.49 due on 11.01.2017.
After confirming with the executive i paid only Rs.30000 but CITI BANK CREDIT CARD put extra charge of Rs.3759.49, for confirming it i called back CITI BANK again on 26.12.2016. When i spoke with the executive she told me that their are charges if you not paid the full amount. I ask her that when i confirmed on 03.12.2016 then why your colleague told me their are no charges if you pay minimum amount which is mentioned in the statement i.e. Rs.4100 before 14.12.2016. She said its not possible because we can't say like that and for confirmation i told her that i want to listen that conversation which happened on 03.12.2016. She updated that such process is not there in the bank we can't share the conversation with the customer, but we can send the mail in written to you. And she raised a complaint(Reference no.[protected] against my query for cross check so their other concern team will listen to our conversation and they will call me back till 29.12.2016 if they find their executive misguiding, or else you have to call us back again.
I didn't receive any call till 29.12.2016 so i called CITI BANK CREDIT CARD EXECUTIVE back on 30.12.2016. This time i spoke with the executive and she said their isn't such things committed from our side. When i ask her regarding call back i was suppose to get till 29.12.2016, she mentioned that their team called me approx 1530 hours on 29.12.2016 but i didn't receive such call from CITI BANK then she mentioned your number was busy. I activated my call waiting service on my phone but didnt receive such call.
Just for cross check i ask her i want to listen to the conversation which happened on 03.12.2016 she replied we can't share the details with client. I told her how i will believe that they are not lying to me. she said assure me we are not lying, i confirmed with her is there any possibility that i can get the conversation any how she said "NO", i guided her that there is possibility that the conversation you can mail to me in written form. Then she confirm with his senior regarding that and said yes its possible and before i told that we cant send verbal conversation, she also try to misguide me.

I have some Question with CITI BANK CREDIT CARD:
* Is they give proper training to their executives, because every executive will tell some other stories?
* Or this the core concept of CITI BANK to loot their clients. (their are more than 52 pages of complaints)
* When they arrange a call back then they cant call again if their customer is busy, because every customer of their must have waited on IVR for more than 3-5 mins?
* For same issue how many times their customer have to call?

Personal advice to all my dear friends, please don't use any kind of services from CITI Bank. (i did a mistake that before applying for credit card i didn't check online complaints regards CITI BANK)
BE AWARE OF CITI BANK.