Discover Credit Card Complaint

Discover Credit card department,

Credit line increase/decrease Connecticut

My credit line with Discover was lowered from - to - not too long ago, they claim a recent review of account/credit score is the reason for their decision. However, the account has been paid on time and never over limit since opening and if anything, the credit line should have increased. At the time of supposed review, the account was paid off with a - balance. Please note, at time of account opening the agreement did not state I needed to maintain a certain credit score in order to keep the - credit line. Please do not mark this as duplicate as there is additional information not previously disclosed.