HiFi Corp is deceiving online clients

On the 9 July 2022 I placed an online order with HiFi Corp for a TV that was advertised as a special offer. The payment was processed and acknowledged online, followed by a message that my order was being processed and would be delivered within 3-6 working days. An online tracking check a day later confirmed the order was being processed. On 14 July an email from Ntswaki Setlau was received to advise the item was not available and the order was being cancelled - and that I would receive a refund that could take up to 3 weeks to reflect in my account. I attempted to call her at the number provided in her email but the response I got was that it was an invalid number. I then emailed her and am still waiting for a response. I checked online and the ad is still appearing. It is unbelievable that a company operates an online facility that does not reconcile stock on hand before accepting payment for an item - and then refunds you effectively up to a month later. If HiFi Corp's system is so defective then why are they still accepting orders for goods they know they do not have? How much of funds are they holding to their credit that will only be paid back much later? What reliance can the consumer place on such a company when making a buying decision? Their email concluded with the statement "HiFi Corp is not obliged to source stock or offer a similar or upgraded item for this sale as stock will no longer be available in future" - that is the sum total of their disregard for a client. An ************* company like this should not be trading online.