No feedback from sales person

We bought a car in November 2017 at Imperial Nissan Boksburg. The sales man said that we can collect our service book the next weekend as it was not yet stamped from the workshop. So the next weekend we couldn't make it as we are staying 200km from the dealer. I asked the sales man to courier the book to me. It's over two months now and we do not get feedback regarding the book and haven't receive it. I keep sending emails but without get any response.