Disgusting service & Communication

So I bought a ShoBox speaker at the Sandton incredible Connections in Feb. Within a month,the speaker stopped working. It wouldn't switch on. I took it back for repairs and was repared. After another month, the speaker wouldn't charge resulting in it not switching on. I got quite busy at work so I couldn't find time to take back to the shop but eventually took it back in around September. I had to call the manufacturer and the store to get updates on the speaker, no one contacted me with any updates. I requested for a new speaker as clearly this one was faulty and would require another up and down booking in and fetching it from the store. I was now spending a lot of money just to get it fixed. The request was declined and was told that a manager was going to contact me. Everytime I contact the store the manager is not available and till this day I have not received the old speaker back or even a refund. No communication whatsoever from the store.