Citibank Credit Card Complaint

Citibank Credit card department,

Balance transfer Texas

Citibank sent balance transfer checks to be used to transfer balances up to my available credit at time of transfer. I submitted a check to 1 of my creditors on -/-/15. I had more than - in available credit. On receipt of the $1400.00 bal transfer check -/-/15, Citibank decreased my credit limit by $5300.00 on -/-/15 & refused to honor the check. They sent out a letter after the fact stating bogus & vague generalized reasons. This is an unfair practice that caused a returned item with the other creditor. I have asked them to stop sending me checks because they are misrepresenting. They said they could not stop them from being sent. I am very displeased. I 've been with Citibank for 20 years. I make my payments on time and I pay more than the minimum due most times. I 'd like the matter investigated & that check honorees, as well as them to stop sending me checks unless I request them.