POOR MECER QUALITY PRODUCT

I bought two MECER inverters on the 21/5/2015 from MITABYTE in Durban.They worked good for less than three months. They were installed in two different homes and only one LED and decoder were connected to each.In less that three months, both inverters started to show incorrect voltage readings and kept switching between line and battery modes.The SAME symptoms occurred with each inverter in less that a week apart.I send it back to MITABYTE Durban to be repaired.Naeem at MITABYTE***,(Repairs dept) informed me that both inverters are rusted??? on the inside.These inverters stood close to the TV's, hifi's,camera monitors and DVD players.NONE of them is rusted,and they have been there for more than 3-4 years respectively,,WITHOUT \rust"AND WORKING !!<br> ARE MECER PRODUCTS MADE OF SUCH INFERIOR COMPONENTS THAT THEIR LIFESPAN IS LESS THAT THREE MONTH'S ??? Is Mitabyte a dumping site for this type of poor quality products ?If this is the case"