********ly charging customers for accounts closed

I went into my local FNB branch on the 18th of March and was offered a Fusion account with a credit facility. I agreed on changing my account and requested Chedelle to please tell me what the settlement amount for my revolving loan is and she gave me the amount and I transferred it immediately and then she called and requested for the revolving loan to be closed. I went into the branch again to collect my new card on the 26th of March and enquired why my revolving Loan is still showing on my online banking app and the lady said it can take up to 60 days for it to be removed. Now I have been charged R69 service fee and R122.62 interest? Why? I paid the account in full and said it should be closed so how do you charge me R191. 62 for an account that was supposed to be closed? I have also been charged R73.02 on my fusion account for interest after I was told that it is interest free for 30 days? Please can someone help me with this and refund me on these wrongfull charges that was charged to my account?