HSBC — Harassment of a HSBC credit card customer

Address:

Haryana

I was HSBC Credit Card Holder bearing No. [protected] whose settlement I did on 14th July 2008 for Rs 10000/ in cash. I have the scanned copy of all the receipts given by the bank.
Even after the settlement, I never knew I was in for more nightmares, till date ie may 2011 I get calls from the Collection executives for the pending payment, I regularly get the statement from HSBC adding interest everytime. I DON’T UNDERSTAND WHY HSBC does not update its records and stops harassing customers. Also so many times I have faxed the settlement letter to the collection executives but no respite
Adding on to the above, HSBC has given my details to Credit Bureau of India and I who has all clear records, with all the other banks now am a defaulter and cant apply for any loan or credit card.
What can HSBC do to a customer first they don’t pick cheques from the collection centres and then they add the late fee and trouble the customers and finally do the settlement which they fail to update, who is to be blamed finally the customer?
The worst card you can have in your kitty and the most idiotic customer care