I'm a female in her 20s and took my 2011 Forester ...

I'm a female in her 20s and took my 2011 Forester for an oil change. After checking me in they told me my car needed immediate maintenance on my timing belt and wanted me to get it fixed that day and it was going to cost $600. I did not have $600 extra on me, so I denied the maintenance and called my dad who is a mechanic in the midwest. He looked into it and the year of my vehicle and model does not even have what they told me needed fixed for $600.
Needless to say, I will not be going back to this business. They either do not know their own brand of vehicles or they are trying to take advantage of their customers.