closed accounts

In February 2013 got loan and credit card from Afr. Bank. On 6 June 2014 went to settle all debt. Loan was paid through my bank, the card I had to settle at Ellerines (Westonaria). Paid the amount I was told I had to pay to settle the card. went back to Afr. Bank. was told that I am too late to do voice recognition as the office close at 4 and I must write a letter. 15 months later I am still paying the card. I work until 4pm, get in town at 4:30 pm. I can not get off earlier as there's no one to do my work. After settling the card, an amount of R4500 was deducted for something I already paid in full. Please give info so I can get this resolved asap, preferably over phone or email. Thank you