Imperial Select Centurion Salesperson's horrible service

My experience with Imperial Select Centurion was the worst. I bought a Renault Captur 2017 model from them in February 2018. The salesperson by the name of Mpho Kgwedi sold me the car without a service book as he claimed that they had run out. I have been following up with him from February to date but he is treating this like a joke as every-time I contact him the only thing he does is laugh and make empty promises. I find this behaviour very disturbing especially for a sales-person if I am going to be treated like a joke after he has made a sale; considering the fact that he was pestering me to buy the car before the sale went through. My car has been giving me problems a few months after the sale, so I decided to go to Renault Midrand and I was told to purchase a new service book since I failed to collect my one when I bought the car. Honestly, I feel like Renault has the worst customer service ever and the unprofessionalism of the salesperson Mpho is the worst as his only means of communication is via WhatsApp calls which I find ridiculous.