Pathetic service

I'm honestly irritated disgusted and offended by the service provided by the staff members and manager of the bed shop in secunda, I was sold a bed late Jan and three months later the springs in the mattress started poking me, the base was faulty so I went there to find out the way forward mind you when I initially got to the shop the first time they just took my money without even confirming they had the bed I wanted, so after waiting for close to an hour they ended giving me a bed that was on display that when I got there people were sitting on and I was told that should it give me any problems since it's a display I should bring it back and they will replace it, now the total opposite is happening I've been to the shop 3times ND all I'm told is that they will call me, we going for 4 weeks now and still no call, I'm stuck here with a faulty bed that I paid for in full, and I'm not getting any assistance from the anyone in that store they just keep telling me to wait for the manager only she can help me, that is honestly pathetic if u ask me, there In-store service is useless and honestly feel like taking legal action against this establishment if this is how they work, I haven't even owned the bed for more than 7 month's but already it's ****ed up, I have everything they need on my side, I guess they just don't want to do their jobs properly, I hope they are well prepared cos this goes against a few pointers in the CPA and also their instore terms and conditions