Bad Service recieved from Mitsubishi East Rand

I purchased a car at Mitsubishi East Rand on 27/01/15. On the collection of the car the sales executive didn't open the service book so that I could view the service history of the car - only a file was handed to me upon recieval of the keys. As I returned home I realized that the file only consisted of the Vehicle's manual and warranty booklets, no service book whatsoever. I immediately informed the Sales executive of this and he ensured me that he would investigate if the book was mistakenly left at their service workshop. After numerous attempts of contact the Sales executive later informed me that he never actually saw the book and would go as far as contacting VW SA to retrieve any servicing history on the vehicle for me. Up to date I have not recieved any service history on the vehicle. I waited for 2x months before my registration papers were couriered to me wherafter I waited another month for Feedback on my number plates, as the car registration reached it's expiry I went about purchasing number plates myself and the sales executive asked me to forward the invoice for the refund on the plates. I'ts been another month now and I haven't recieved any feedback on this.