Feeling depleted

I purchased a 3kw inverter kit from them in Feb this year. The product came and was installed into my business and was working great. Not even 2 weeks later the device failed. I was told to send it back on my cost. I waited more then 4 weeks for the inverter to be returned after numerous requests when it will be replaced only to receive the same inverter still not working. It's now again almost 4 weeks later and still no guarantee whether I am getting a new in inverter since the product was still within it's waranty period. I paid R10350 with courier for this package. I am sitting with the batteries but no inverter. I feel depleted having to keep on asking if it will be replaced but keep on hitting a dead end. Its now almost 3 months with such poor customer service. I raved about Ledtronix but take it back.