A rip-off sale

I recently bought earphones from Ackermann Sandton City. I asked about the warranty since electronics are bound to have faults and they said their warranty for exchanges in only 7 days. 9 days later the one ear piece stopped working, today is 15 days later and now they completely shut down. It doesn't make sense to not have warranty on electronics. Ackermanns just ripped me off. Other retailers have longer warranties on electronics because they understand their products and want to keep their customers happy. Now my money is gone down the drain. R80 is a lot to spend on something that will work only for 15days. It's very disappointing.