FNB took my R4500.00 & I switched to Nedbank in June

I closed bank account but still I'm charged Debit order & bank charges. I received R4500.00 in my account and FNB debited that amount immediately. I changed bank account to Nedbank but still I'm being charged for debit orders and I already paid them on the other account and made arrangements on FNB debit orders. Pls help, I was at Kolonade branch to close account last week but still I'm charged for bank charges of account I'm not using?