Incorrect STOCK limits online - COMMUNICATION NON EXISTING

On the 28th of June I ordered an Inverter to keep my security system running during load shedding. Delivery date was set for the 1st of July. By 11:00 on the first I decided to call the call center as I did not receive any communication about late delivery. After 5 hours I was informed by the call center that there was NO STOCK!!!! Why was I not informed earlier about the status of my delivery, WHY IS THERE NO COMMUNICATION. Surely your online system should be managed by professionals? I am not prepared to wait a month for new stock and indicated I want a refund. Till today there was NO communication that a refund was put in motion. I was also informed that it will take 5 to 7 days AFTER the finance department received the notification that a refund needs to be done. How long will that take? You are playing with money that we as customers don't have to throw around. Surely you will understand the pressure we are all under. I am very disappointed in your service and demand communication about my refund ASAP.