Warranty claim disappointment

Good day

I've bought a Telefunken Stereo System on 2017/11/03 (INV No: 024250) and on 2018/05/28 I took it back to my local branch due to a static sound coming from the speakers. It took over two weeks before they sent it away to Telefunken for repairs. On 2018/06/21 I received a call from the sales person where she stated the stereo is not repairable and that I have the decision to decide if I want my money back or if I want to use it on another product but she has to get authorization from her manager. After she spoke with her branch manager, he said that I can't get my money back because I had the system for longer than 5 months and that they first have to see if they can't get me the same product again. I asked them if I will receive another 1 year warranty on the product but they said no I won't. I was also told that they will receive new stock on 2018/06/25. It is now 2018/06/27 and I called to find out what is going on but there is still no news about any new stock. Tomorrow (2018/06/28) it will be a month that I'm going without the stereo. Also I was told that the warranty continues from the first date of purchase and due to poor service, I'm basically losing an entire month of warranty at this stage since I haven't received any replacements of any sort. I've bought exactly R26 145.00 on that day and I can't even claim a simple 1 year warranty for repairs or refunds. If a simple product like a stereo system takes a month to replace/repair how long will it take to process any of the other products I buy from OK? I'm extremely disappointed in the service and I feel like I won't support OK again due to this. I specifically bought from OK because it was a local retailer but I will go a different route next time.