F.N.B. refuses to help me with a ********** login

Yesterday, the 19th July 2015, in the evening I tried to log into my personal online banking profile. It told me my saved password was wrong and I tried again. It then told me I had entered my password incorrectly 3 times and I needed to change my password. I did that and entered my online banking profile. Upon opening, a message came up asking me to confirm a link to an FNB App on my iPhone 6. I don't have an iPhone 6!! I went to the closest FNB branch this morning & they helped me call Online Banking. Online Banking referred me to *****. I called *****. ***** referred me to Online Banking. I called Online Banking. Online Banking referred me to *****. Can you see a pattern? During the first call to Online Banking we determined that someone had tried TWICE, unsuccessfully, to login to my online banking profile last week Wednesday, 15th July, at 13h55. I checked my internet history and my history on that day ends at 13h30. Nobody at FNB will help me figure out who is trying to access my banking profile **********ly. They all say they \don't have the tools". I say they don't care. \""FNB"