Samsung for life? NOT

Following a recent electricity outage our Samsung Speed oven FQ159ST failed to switch back on. On recommendation we took the oven in to Liptronics, only to be told after a week that the motherboard had blown and this part was no longer available from Samsung SA. Being no more than 3 1/2 years old, I contacted Samsung SA on NUMEROUS occasions only to be told that my issue is being addressed and that my call would be returned. When in fact my call was finally returned, I was only to be informed that Samsung SA did not stock parts of appliances which model is older than 5 years, and that there was nothing that could be done to assist me. Really Samsung?? Client support?? This is an oven that was purchased new and in good faith that we were purchasing a quality product backed by service and part availability. Sadly an expensive presumption on our part. One electricity failure = blown motherboard + no replacement parts??