Zero Service from Makro!!! Replace my device!

I have never been one of those customers that resort to online platforms to get attention as I am in the service industry myself, but it seems I have been left no alternative... I purchased a Shox Colossus bluetooth speaker 23/04/2022 from Makro, Milnerton, in Cape Town. The sound quality is fantastic but after using it twice the speaker would not charge or switch on. The on/off button also pushes into the speaker when depressing it to turn the device on. This after using the product twice. As we reside in George, I was not able to return the product immediately to swop it out with a new one. My wife then took the speaker to Makro in PE because she had to travel to PE for business. Makro advised that even though the product clearly looked new and was in original packaging with all accessories, they would not replace it because the 7 day swop out period had ended. It would need to be sent away for repairs. After voicing my disapproval it was clear that I was going to get nowhere. The speaker was booked in and sent away for repairs. We heard nothing, so then eventually I contacted the branch to find out what was happening. I was told the speaker had returned but the technicians could not find any fault with the device so they sent it back to the store. Why would I go through the effort to get my speaker back to the store for repairs if there was nothing wrong with it?? I called the manager of the multimedia department (Benny) who promised to get back to me after I advised him that this was not the first time I'm trying to find out what is happening with my speaker. He promised to come back to me after checking the speaker himself but to date I have not heard anything. I don't have buyers remorse... I don't want my money back... I also don't want my defective speaker back... I want a replacement speaker as I purchased a new product which clearly was defective. Please can someone that is able to make this happen contact me urgently?!