FNB giving me issues as I try to terminate my account with them

I am trying to settle my overdraft and close my bank account so that I do not have to deal with this bank ever again. I sent notification via email on Friday. Today I tried the secure chat. They told me that their operator was wrapping up another call and would be with me shortly. I was still waiting about 15 minutes later. Then, I called the premier banking line and the operator claimed not to hear me. I want out, now.