Poor customer service

I bought a hair cutting machine in February this year, after some time it stopped working, I took it back to the store, I was given another one, upon reaching home, the same was not working, I returned it and I was given another, which worked for a while and stopped again. When I returned it, I found a rude staff member, talking to me loudly whereby every customer who was by the tills could hear what he was saying to me. I confronted him. He was saying, they don't exchange machines, he has never seen anyone returning a hair cutting machine. He was not there when I returned previous ones. I told him that the machine says 1 year warranty what does that mean. he says even if it says 1 year, pick n pay offers 8 months guarantee. He then said, they changed for me the last time, so I think I can just be walking in and out to collect new machines, he wont give me. He says even if he collects the machine, it will be to send it for repairs and those who must fix it, they can come after 4 months to collect it. He then called a manager, who ended up taking the machine. He took my slip and wrote my phone number on it and then said when it is ready, i will be called to collect it, or after a month I should come and check, whoever will be there can assist. I asked him what proof do I have that I left the machine, because there is nowhere where they record that I left something, I was not even given anything to show I left something with them. After a month, I went to the store and the same rude guy was called to assist me, I told him I have come to check my machine, he then went, to me I thought he went to check. I waited and waited, and by that time I was walking with 3 of my children. after a some time, one lady comes and says the guy says the person who assisted me is not around, so I should give her my number and they will call me back. They never called me back. I then wrote a complaint to their customer care, they also did their own. My case finaly refered to the store, twice they called and I was unavailable. They emailed asking what is the best time to call me, I responded and no one ever got back to me.