problem with speakers bought at HP shop

I bought a set of Creative blue-tooth speakers at the HP shop at Cresta in July 2013. Intermittently, one of the speakers sounded very distorted and I went back within 6 months. The staff at the shop found nothing wrong and would not take the matter further. I tried once more after a year and the staff tested the speakers, found nothing wrong and refused to take any action. A staff members remarked though that the one speaker sounded much softer than the other, but seemed otherwise oblivious to a possible problem. The intermittent distorted sound continued and I went back to the shop in late 2014 to request replacement of one speaker (at my own cost) but this was turned down, because the HP shop doesn't sell Creative speakers anymore. At head office in Cape Town I got similarly a cold shoulder. If it's not HP equipment they don't deal with any problem, I was told. <br> The speakers were rather expensive originally although I got them marked down significantly.