FNB agents cannot assist on credit cards

I have been calling FNB as my credit card has been declining transactions . I am getting transferred from one department to another , and seems like none of the agents can help. They keep saying they do not have the authority to help and keep transferring to another department this keeps happening and its like i am going in circles. How ridiculous that the bank cannot check what is happening on their own cards and the agents do not care . I am the one who is spending on calls on their customer care .