Bad customer service from Game and Russel Hobbs

In 2019 November i bought a microwave at game menlyn. The microwave had a warranty of 1 year plus 1 extended. It was not explained to me tht i need to register for the extended warranty. My microwave stopped working in january. And i heard tht if its still within warranty i can take it back for repair. I only registered on the day my microwave stopped working because i was not informed on the day of purchase. I still had my slip i called game and informed them tht the microwave is no longer working but its still within extended warranty the consultant advice i bring it back. Went to menlyn with the microwave.

Now Russell hobbs is saying they cant fix the microwave as i only registered now. I asked how do i register if the consultant didnt tell me anything. If i was well informed i was gonna register and keep the slip safe. But because o was nt informed i only kept my slip. Please help me on this cause the microwave is still on the good condition i cant loose it because of their untrained consultants