Unsatisfactory customer service

Purchased a microwave from Makro a few years and paid extra for the extended warranty which only expires in 2022. The microwave switches on but there is no heat. Took the microwave on the 4th April to the Germiston store which is where I purchased the microwave. The microwave was sent to LG for repairs. However, I am still waiting for feedback on the progress of these repairs or if the microwave is to be replaced. It is now going on 2 months and after numerous emails and phone calls to the customer care Centre as well as another store gist to Customer Care, nobody can give us any feedback on the progress or resolution. Reference number from Customer Care after logging a call is *** and assessment note ref nr when the microwave was handed in is ***.