ICICI Bank — principal amount

Address:

jp nagar, 560078

I have ordered the watch from flip kart for installment,
then i returned the watch, but the ICICI bank as added the principal amount to pay, i dont know that i need to cancel,
so i checked the statement so called to them for installment cancel and its as canceled, But they have added to principal amount to pay,
and the bank as paid the interest to flip-kart and then
flip-kart ar returned the internet with amount of product,
then also they asked to pay and i have escalated the to team but there is no response, i called to Customer care even they are not explaining it proper,
But i have paid the amount and i have canceled the credit card,
and i filled the fuel for 270RS they have charged for 281rs when i asked they said need to swipe only in ICIC swipe machine, please check for this and please help me for query.