No stock, No refund for over a month!

Made an order online with builders warehouse on the 18th of July for 3 outdoor lighting fixtures. (Builders Online Order Confirmation ***) I opted for the collect option as I could see these fixtures were only available at the constantiaberg store. I'm from the Northern suburbs I decided to phone through before collecting to ensure that I wasn't gonna make the big drive unnecessarily. After a multitude of phone calls constantiaberg finally called me back and told me that they actually no longer had stock of the items I had ordered. In turn I had to cancel my order and opt for a refund. I made a few calls regarding the refund, of which because I paid with Zappa, I was to WhatsApp one of the call centre guys my banking details which seems rather unprofessional too. However over a month later and I'm still without my refund. Not only are you offering items on your website which are not available and you stock taking system is not accurate, but I'm also sitting a month later, out of pocket without my refund. If you intend to have a online order system then I would expect the internal process to be seamless and not to have to beg for a refund for items that I actually wanted in the first place but you failed to tell me were out of stock. What a nightmare!