Bad service/missing purchase

I bought a couple of furniture and appliances at OK furniture cash and in less than a month the Russel Hobbs microwave I bought stopped working. I took it back in March to the Blue Downs branch I bought it from and was told it should be fixed within 7 days. I went to enquire in April about it as I wasn’t getting any communication from the branch and they told me they will follow up and call me back but another month went passed and no feedback was provided. I went to them again in May and the lady that works at the back that deals with exchanged and payments told me my microwave is back but I can’t get it as it’s loadshedding and they can’t get into their PC. The following day I went again and was told that lady is not at work and she does the releasing of stock so I must wait for her to get back. After a few days I went back and was told that my microwave is not there anymore. The manager then offered to give me a smaller make microwave to compensate which I refused. I bought a 28 litre microwave because that’s what I wanted now they want me to take a smaller one all because they lost mine. When I went back on the 1 June the manager told me my microwave is with the supplier and she doesn’t work for Russel Hobbs so she doesn’t know when I’ll get it back. Firstly the attitude I received from that establishment left a bad taste. They lacked customer service and even the so called manager had a “I don’t care attitude”. The lady who works at the back who initially confirmed that my grey Russel Hobbs 28 litre is back, now changes her story and say she knows nothing about it which now makes me out to be ****. The lack of communication is so bad! I’m the one having to do follow ups and go there everyday because they aren’t communicating anything. I spent R33 000 cash on that day in that establishment thinking they are honourable and that they actually deserve my support but after the treatment there they will never ever get business from me. Their sales man Siya who is always my go to guy when I make my purchases there is the only epitome of great client service, if only his great qualities could rub off on his managers and co workers then that branch would be a centre of excellence. I need this debacle sorted out ASAP because I’m definitely not leaving it there. I want my microwave.