bad service

I had a garage card with standard bank, which I closed Last year August and I payed a settlement amount of R3500.00 of which my limit was 3000.00 and to my suprise later I got an sms saying that my account has been handed over to Attorneys and to day I got a letter from those attorneys. Before I closed my account I went to standard bank branch at library gardens to ask for my settlement amount and the branch manager called the contact centre and was given an amount of R3500.00 which I then paid in full and i asked for my account to be closed. i gave the card to the branch manager and the card was destroyed in front of me. I'm very dissapointed to standard bank they way I'm being treated and they never even have the decency of sending me any statement to show me the transaction that took place in my account so that i can be able to determine if the transactions were made before the account was closed or not. all I need from them is the apology letter for handing my account to their attorneys and the statements showing me the transactions that belong to me. I'm one person who does not run away from my obligations . I feel I'm being treated unfairly by standard bank.