MM All Electronic Useless service. Samsung poor after sales and product quality

I contacted the Samsung appointed repair agents, MM All Electronics regarding my Samsung Fridge/Freezer not cooling properly. I was informed that the call out Fee was R550.00 which I had to pay prior to them coming out. The lady took ALL my details, Fridge model number, serial number, etc. I was never informed that my Fridge is no longer supported stage. The technicians came out, took a look and informed that the office would phone the next morning. NOTHING. I called at 11am and spoke to an arrogant young lady. She smugly informs me that my fridge is old, (if I remember correctly +/-7years old) and no longer supported. She further smugly informs me that I should purchase a new fridge. I ask for refund of my call fee as they should have know and informed me upfront that my fridge is not supported being the authorised service agents. I ask to speak to her manager, another guy phones me, same story, I ask for my money back, no luck. So, good luck to MM All Electronics I am sure they will get rich off my R550.00. This is the 3rd time in the past few years that the heating element and cooling element needs replacement. Completely useless service. Will not use them again and most certainly not purchase another Samsung Fridge.