Damaged cv joint. Dead battery. Light fittings

I bought a VW polo from Park motors welkom freestate South Africa. The sales man Hennie Britz assured me that the car is in great condition. About 4 months later more or less, I had to replace the left cv joint. Today I had to replace the battery. The car is only 3 years old and in such terrible condition. The car did not have original cv joints nor did it have its original battery. Next week I have to take the car so that the left head light can be refitted and put in properly. In the new year I have to replace the speed sensor. All of which is on my own cost. I'm terribly disappointed in their services.