Sorry but I have to draw a line here you're talking absolute nonsense.
I did not question again about my issue with the boiler after reading the comments of other engineers. So again I don't know where you are getting the not taking their advice line from.
My last comment on MY thread was regarding holding a engineer liable for their diagnosis, instead of just throwing parts at it. A few comments suggested to get someone competent in hence, I asked can I hold them responsible for a their diagnosis.