Account closure run around

All I want is to close my ackermans account, so I settle the outstanding balance on account, debit order to run on same day, debit order runs on 20th, I go back in to store on the 23 in Johannesburg, the advise the debit order did not clear, I show them on account it has, and reverse debit order and pay the balance in cash, advise I wanna close account, I get looked a crazy person, then they call the floor attendant that the have in store, he says must complete and account closure form which they don't have in store I must go to a different store, ok so , I return to ackermans store on Saturday,south gate mall, and they advise you don't need a form just need to call in, so the call in and now there is a balance of almost r500 to pay on the account, from where does this balance come, the call centre agent was of no help, instead jus transferred the call to a line that continuously plays music after that none of the calls made were answered , I just want the account closed!