Incorrect Billing and Long Outstanding Refund

I bought a Recliner at Coricraft on 4th of July 2015 under six months interest free agreement. I was given Coricard after applying for the six months interest free offer as advertised by Coricraft. Our Sales Person was Erika Lombard. We paid / settled the amount within six months as agreed / known to us. However Coricraft finance (RCS) charged us interest and on top of that over deducted money from my bank. I called the Call Centre as advised by Erika and informed them about the problem on the 20th of October 2015.<br> <br> The Call Centre promised to correct the problem and refund me. They requested I send my bank confirmation and copy of ID. I obtained the bank confirmation letter from my bank (which costs money) and sent it to them along with a copy of my ID. However instead of receiving a refund I received an email on the 18th of Nov 2015 requesting the following:<br> - A copy of your RSA green barcoded Identity book.<br> - A letter with your banking information i.e. your bank account number, branch code & please remember to specify if it's a Cheque or a savings account.<br> - The proof of all the last payment/bank statement (for debit order payments).<br> <br> All this information is in their possession.