First National Bank of Omaha Won't let me use balance transfer service because I've used the card already Omaha Nebraska

I've had this First National bank card for nine months. I've been on time every month, I've done one cash advance and did one balance transfer. The main selling point of the card is balance transfer. I did a balance transfer for $400 and tried to do another four days later. I was told they couldn't do a transfer. The reason I was given was that I used the card more than they "liked". This is the craziest thing I've ever heard from a credit card company. I'm being punished for taking advantage of the services. What makes it even crazier is I pay the bill on time. This needs to be fixed, I should be able to use my card and the services especially if I'm a good customer. I am.