OneCart attitude to Incomplete Order delivered

Hello Peter on April 6th 2020 I placed an order with OneCart order number 670926, when this order was delivered there was an item missing I ordered 2x 500 gm butter and only one was delivered. I emailed OneCart and received a message back on the 20th of April from Loyiso who told me that she would credit my OneCart wallet with the cost of my missing butter R75.99. I emaied her back to say i didn't want to use the company again and received a message from Loyiso on April 23rd saying she had put the money back into my bank account, however this was never done and i have been contacting OneCart every few days since. all i get is a reply Thanks for reaching out we have received your request one of our support hero's will get to your enquiry ASAP but they never do. It cost a lot of money to have my order delivered I am retired. It is not the cost of the butter that annoys me so much it is there don't care attitude