[Resolved]  HSBC - Credit Card — Wrong Billing and Forcing me to pay the finance charges and interest.

I have used HSBC credit card online for Makemytrip.com for an amount of 5000/- RS but the makemytrip.com wrongly charged me 5000+60, 000. And the same was intimated to HSBC before the stipulated time. And HSBC customer care asked me to pay 5000/-Rs and that they will recover from the client. It took them 6months to recover from makemytrip.com. HSBC recovered the complete 60, 000 from makemytrip.com. And the 5000 was paid in time with HDFC cheque.

BUT now HSBC is still charging me to pay the finance charges and interest charges along with overdraft charges.

Firstly, I did not use the amount
Second, I paid the amount i used

When i ask HSBC through email they say to register in their online banking and raise request. When i go to online registration they ask me CC num and its pin. The pin i do not have and if i ask for it they are asking me to pay the amount and then they will give me the pin.

Why should i pay for the amount which i did not use???