Poor Service Makro Online - Return no MAK***

Via Makro online, I ordered a Sonoff smart switch. The switch worked for 2 weeks then burnt out. I logged a return, number MAK***. The supplier immediately called me and infirmed me neutral and live was reversed, which I proved was not the case. The return was taken for assessment. The Supplier later informed me via Makro that the load was 2 high. The load is LED lights at 0.34A but switch is rated at 10A, so not the case. It has been more than a month & Makro online has not responded to my queries. It is obvious the Supplier is evading a warranty claim by provided poor reasons for failure Makro online’s after sales service is pathetic.