FNB Transaction Declined

FNB declined a transaction on my account and said its not allowed on my card I have to go to the branch. Went to the branch and I was told that they cant help me only calling the number on my card will help, after holding for 20 minutes I was put from one department to forex department to card limit department and all these departments could not help. The consultants at the FNB Menlyn branch couldn't help either. The other guy had the nerve to laugh at my frustration. Even if I am not an important client, I am taking my small cents to any other bank, its been 2 hours I have been trying to get through to your call center again. I want to transact on this card and you are saying I cant and none of the departments cant even figure out why.