FNB you owe me money!

I went to collect my new credit card. After 4 years FNB decided that they'll give me my ****en name back. When I queried that, they claimed that I have 2 cards for my 1 credit card account. 1 card in my ****en name and the other in my married name. This is absolutely crazy I never reqeusted this nor even knew that I had this. So the awesome teller phoned credit division stating that this is not how they do things and asked them to reverse the charges for the one card over the past 4 years. We never even got a reply. When I went to pick up my new card with the proper surname I asked about the charges. The teller phoned and they stated it would be payed back to me within an hour. Then a couple of hours later I received a mail stating that I am responible for the payments and that FNB will not be refunding me and if I have any queries I must phone them. FNB you are dishonest!! You owe me my money.