Expensive systems is not so decent

We bought a brand new LG Surround sound system at RUSSELS in August 2015 - CASH. It was working 100% but only for the first month. Early October, the Screen was suddenly dead,there is no screen display. When we took it to Russels complaining, it was there for a week and when we followed up from them Russels referred us to \Leo's repairs\" in Newcastle because they apparently fix all faulty electronics bought at the JD Group so they said that it would be better if we take it in ourselves because if they are going to send it, it may take up to 2 weeks. When I took it it, they fixed it within 2 hours. Then it gave the same problem in December so I took it again and they fixed it again. In January it gave me the exact same problem and I took it in again. Until today 31.03.2016, Leo's repairs are still waiting for the part to fix it. In the meantime we are sitting with a non existing LG surround sound system because it is ALWAYS in for repairs. They refuse to replace it and now we have to struggle with something that came with a manufacturer fault from the beginning. You think you buy an expensive system because it will be decent - only to find that it was the worst decision!"