Out of stock online purchases not credited back

I have purchased online goods from Boardmans on my Edgars card twice. On both occasions and eventhough the website reflected available stock, they had certain items out of stock (clearly indicated on my delivery note on both occasions). On the first occasion it took them three months to credit me back after various email complaints. This time around, the delivery of order #*** OCC:*** took place on 15 August 2015. Yet again, three months, 15 emails plus a request to issue a final account, where the outsanding credit of R893.51 is reflected, later and still nothing!!!!! I have been a client of edgars for over 20 years with not one late payment and this is how you treat your customers. As the trend is for companies moving to online sales, you need to get your act together and improve your online ordering and billing processes.