Citibank Credit Card Complaint

Citibank Credit card department,

Credit line increase/decrease Massachusetts

Citibank , NA has erroneously and drastically reduced my credit limit to my credit card ending in -, the credit limit has essentially been reduced to zero as the new limit is the balance of my account, severely impacting my balance to availability ratio. Citibank sent me a letter informing me of this decision on -/-/16 stating due to a delinquency I have with another creditor, they have reduced said credit line. They did not specify with whom I have this said delinquency with and when I called their customer support, they could not tell me where said delinquency was originating from and simply said it was based on my - credit report. I have viewed my credit report from all - bureaus and I do not see any delinquencies. In the past 10 years, I have never had ANY delinquencies of any form with any of my creditors, and in the years I 've had my Citibank credit card, I have never made a late payment. I have always made a diligent effort to maintain my credit standing to the highest level possible so it came to me as a surprise when I was informed of Citibank 's decision. When speaking with their representatives - ( employee ID - ) and his Supervisor - ( employee ID - ), I was told they would not reinstate my credit limit to it 's original amount, and the only way I would be reconsidered for reinstatement would be for me to request a credit increase through " Customer Service '' which would result in a " hard pull '' inquiry, resulting in additional damage to my credit reports. I do not have any delinquencies on any of my credit reports, and Citibank 's decision to revoke my credit line has drastically tarnished my credit. I wish to understand why they have made this decision as I do not have a delinquent account with any creditor and their unwillingness to correct their wrong doing has caused me great -