HSBC Credit Card Complaint

HSBC Credit card department,

Closing/Cancelling account Virginia

I had a credit card for - years and paid my balance each month. The card was with HSBC. For some unknown reason, they closed my account. I called them when my card did n't work and they stated they had no idea why but the account was closed and I 'd be informed in writing of this within - days. They told me they could n't do anything. I would like to know why they are allowed to close accounts on people who pay their bill each month.