Money paid now I can't close my account

So I called 5 times today. Not to apply for an account or to increase my limit but to close my account. The agents including managers need customer service training. I paid this account in full and when I called to close my account the account is blocked by 1 of the *********** agents. No one called me to verify the over 5k I paid. But because I couldn't remember where I last used the account my account gets blocked. I tried explaining this over and over again that if I was calling to increase my limit I would 100% understand. But all I want is the account to be closed. Now I'm being inconvenienced. I now need to provide my bank statements and ID as if I'm applying for an account. This is ridiculous. And I keep being told the exact same thing. And how does a big company like this not have a complaints department. That's what I'm being told. Never ever again will I set my feet in any store that is affiliated with Ackerman's.