Poor service delivery from OK Furniture online shopping

On the 4th of July I made an online purchase from Ok Furniture for a Magneto rechargeable LED lantern. The selected item showed as available and that the estimated delivery time to the selected OK Furniture store (OK Parow) where I selected to collect from is between 7 to 10 days. The payment transaction was processed, and I received an order number. On the 5th of July I received an email to inform me that they don't have stock and that they will inform me when it is ready for collection. On the 9th of July I contacted them again to follow up and was informed that they still don't have stock. I then requested that the order be cancelled and that they refund me. I received an email to inform me that someone will contact me to discuss the refund, but no one contacted me. I didn't receive any further update from OK Furniture and on the 15th of July I followed up again with them just to be informed that they are still waiting for stock. They then rep**** to me on an email saying that they have stock in Philippi, Gugulethu and Belhar and that I if I cannot wait for stock to be delivered to the selected branch in Parow then I must collect from one of the above-mentioned stores. All 3 of these stores is more than 100Km's roundtrip from where I stay, this would mean additional travel cost to me. I then rep**** back to say that collecting from these 3 stores is not an option due to travelling cost. Shortly after my email reply, a lady from OK called me to say that they have stock in Vredenburg and Springbok and if I could perhaps collect from one of these 2 stores. Well Springbok is +- 800 km's from Cape Town so my answer was no, I cannot collect from these stores. Yesterday the 19th of July I mailed them again asking for an update and this morning I received a reply informing me again that they have stock in the Belhar store and if I can collect from the Belhar store. I responded back AGAIN, saying that Belhar is far from where I stay and that it is not an option. I have now AGAIN requested that they refund me and will now have to wait on their next response. I have tried to get the contact detail for a Manager or a Supervisor to speak to but without any success.