Mariam in Toronto

I called them to look at my washing machine which just stopped working - it's less than 4 years old. I was told the service call was $80 cash. Am I wrong to assume that a service call includes the diagnostic check? The tech came out and said he will waive the service call cost ($80) but the price is $290 + tax for his labour but this will go to the final cost of the repair and all I need to pay for are the parts when they come in. He was here for 30 min total. I called them after 2 days and was told the parts are not available. How does this make sense - my machine still doesn't work, there are no parts for it and I'm out of pocket $327!