Made a payment to Citi and the payment was short by {$1.00}. It was a mistake on my part when I submitted the payment using my XXXX XXXX online bill pay system. Our APR has now been increased to 29.99 % because of the {$1.00} mistake on our payment in XXXX. When I discovered the shortage I called Citi and paid the shortage by phone and the representative assured me that our interest rate would not increase. Called Citi when I noticed the increase in APR to request they lower the APR. They refused. Asked to speak to a supervisor and was put on hold for over XXXX minutes until I finally had to hang up because I was calling from work and could not remain on hold any longer. 
