HSBC Credit Card Complaint

HSBC Credit card department,

Closing/Cancelling account California

I cancel the credit card because I was unhappy with the customer service and the business practice. The credit card was cancelled -/-/- but despite numerous attempts to close the credit card account ( each time I was told the error had been corrected, the account was closed with - balance ). These attempts including reach out to Consumer Financial Protection agency ( Case # - & - ). So far, I have - written confirmation letters from HSBC pertaining to the closing of credit card. But despite the confirmation letters, HSBC decides to harass me yet again about the account that I close -/-/- and demand payments. There is very little an individual can do against a big financial institution like HSBC. I was diligent in making payments, contacting the bank to close the account and I have the letters from HSBC confining it is close. But none of this matter when HSBC can decide to send me a statement demanding payment and and resume the harrassments. Even letter from HSBC with the agency case number does not stop the bank to come after me again.