No refund passed

I had made a purchase on the 25th July 2015.I returned the item on Saturday 1st August as I no longer needed the part.I returned it unused and was sent from the 1 person to the next.They eventually decided to pass the credit and did a refund on their machine as I paid via debit card.I have called them to notify them that I did not received the refund and was asked to send them a fax with my receipts which I had done yesterday.This morning I called them again and was now advised to wait until Friday.I have confirmed with my bank FNB and no credit was passed.In fact they advised that a refund cannot be done on a debit card or cheque card.They are supposed to refund me in cash.Their staff is extremely unfriendly and unprofessional.Now when I have to return the goods I am getting bad attitude from them.I eventually lost it now and have advised that I am posting this on Hallo Peter and they still were not fazed.I was told that the store manager is not available and when I asked to speak to anyone else in charge I was shouted at and told to hold on for Isabel.She then told me that I am rude when I told her that I would like to get the funds into my b acc.Truly shocked.