Citibank — complaint against wrong credit card statement of citibank

Address:	Pune, Maharashtra, 411001
Website:	www.citibank.co.in

Hello sir,
I am pankaj kumar panday. and my CITI bank credit card no. has [protected]. I was purchase a Vu 140 cm (55) full HD LED TV on dated 05.06.2017 Rs 41999/- by flipkart from citi bank credit card no.[protected]. After that I also cancelled this item on dated 05.06.2017 and Flipkart return my balance Rs 41999/- before your last billing date on 12.06.2017 and refund Id has 95135870.
But citi bank not showing this transaction on my credit card statement in june 2017.
I want to say that citi bank dues was Rs 34799/- for month of MAY 2017. and last payment date was 12.06.2017 but flipkart refund my amount Rs 41999/- before 12.06.2017. this amount Rs 41999/- has payment against dues of MAY 2017 month Rs 34799/-. But citi bank not showing this transaction in the statement of June 2017.and ADD the charges late fine & interest fine and over dues fine. which this is not legal charge. Because my amount Rs 41999/- credit before 12.06.2017. if citi bank said that this transaction is not valid for payment of dues. Than i want to ask that HDFC bank and CITI are same private bank. and both bank are follow same rule and regulation of RBI bank rule. but HDFC bank deduct dues amount if any amount credit before last payment dues date. i am also send HDFC bank credit card statement. u see carefully HDFC credit card statement of JUNE 2017. and HDFC bank show all success and unsuccessful transaction. But citi bank not show my refund Rs 41999/- amount.
I was transaction from HDFC bank Rs 20199/- on dated 05.06.2016 by flipkart and i was cancelled this product same day. than HDFC bank show both debit and credit amount in the month of JUNE 2017 statement. and basic of return amount Rs 20199/- show payment against dues of month JUNE 2017. But same days and same condition i was book the LED OF Rs 41999/- and cancelled this item. but u r don't show debit and credit amount.
i want to ask u that what is the different RBI rule for CITI bank. what is this? are CITI bank follow other RBI rule. what is the different RBI rule for CITI bank and HDFC bank.
I am attached all HDFC and CITI bank credit card statement for your knowledge.
I am submitted flipkart Refund screenshot and All valid documents.
dear sir, i was do the email of citi bank four time. but they are not answer my email. and they do'nt solved my problem. and they charge every month extra interest and other charges.

thanks