Furious customer

I am very disappointed with supposably such a reputable store. I bought a inverter from them. It failed within 6 months. Thinking it was a easy process I returned it. They assured me that I would be assessed and then I would receive notification of the situation. A month went by and no answer. I then got hold of customer service who did very little to help, logged tickets etc. Then when I phoned 5 weeks later. I was told my return was not logged. I have now waited 5 weeks still no response and so I am having to get by working from home with no inverter and having to waste my money finding wifi spots. There is still no communication from them unless I call to complain again. Even worse I went into the store where quite frankly the people behind the desk are not professional at all, letting people cut in front of me in the line. I really hope that it was not to do with how I look and had no regard for protocol . This is unacceptable and will find ways to get to higher up to get my situation sorted as it will probably be 2 months before I have an answer. I will never purchase another thing from homechoice and I suggest that other people heed my warning