Bought a pre owned Car on December 2016. Sales per...

Bought a pre owned Car on December 2016. Sales person said everything is in top (excellent) condition. Now every time I have to change my oil, there is something new to fix. In just a years span i payed around CAD1,500 to get it fixed AND expecting ANOTHER 2,000 SMH. FYI i get my car serviced here aswell. So mich for "Excelent Condition" and "We Go Behind Our Product". 2 sentences promised me when they sold me the car.