Bad Customer Service

At the end of September 2015 I purchased a Chevrolet Cruze 1.6LS from a GM dealership in Alberton through a sales agent named Colin Smith, recently I started experiencing embarrassing moments where the vehicle would simple not start, I took the vehicle back to them and they told me that I must replace the battery I contested this seeing that I only had the vehicle for 7 months and it is still under warranty! surely when they sold me the vehicle these are some of the things they should have checked. I would like to warn other would-be customers to stay away from that dealership due to ************ behavior by some of the staff. I even sent an email to the salesman who vehemently denied responsibility..what a bad experience I have had with this dealership, I regret having done business with them>