BOSE POOR QUALITY

I bought a Bose wave soundtouch clock radio with cd player 20 months ago being an avid supporter of Bose /R16000 From the start i struggled to connect the unit to wifi and bluetooth a few months later i was completely unable to use the wireless functions( wifi/ bluetooth) I took it to Bose who sent it away and informed me that a power surge had damaged the wifi/ bluetooth board and that it would cost R5900 ( the unit being outside of its 1 yr warranty) Well i have an inverter suppying power to my home ( pure sine wve power supply with zero possibilty of a power surge) Secondly the wireless board gets it power supply from the main unit clock radio so if it was a power surge surely that board shouldve been damaged 1st? This is extremely poor quality from a premium brand such as BOSE I will be moving to another brand as this is extremely poor service and quality