Customer complain

I bought a bed at Beares uPongolo last year June/July. I was not happy with the bed that I bought. I called the store to let them know I’m not happy. They said they will call their supplier off which they did. Supplier called me and arranged an exchange but up until today I have not received an exchange they keep sending me from pillar to post. I suggested that they give me a new bed but they keep saying I must buy a new bed while I’m still paying for the other and have two beds. I’m really sick and tired of this now. I need this to be resolved ASAP