Customer service complaint

I purchased my first car from Renault East Rand in June 2021 with the help of their sales Rep who at the time of purchase told me that the spare key for my new car was still with the previous owner and that they will collect it from her for me. I agreed and waited for months for them to get back to me. I would email for feedback which I would get after a long wait. I was then told that the previous owner lost her key and that THEY would cut out a new key for me and will let me know when I can bring my car in for programming. The beginning of 2022, I messaged the sales rep to ask if the key was ready and he said that he no longer works there and I should contact management or Renault directly. It should be noted that at the time of collection I signed the contract stating that the key was received but with knowledge from the sales rep that I will receive the key once ready. The new sales rep refused to assist me despite the fact that I have sent him proof (messages from previous sales rep) that the spare key will be sorted. He then said to me that if taken further, the case won’t be in my favour because I signed the contract but this arrangement was made between a Renault sales rep at the time and myself, being the customer. This problem was now pushed to their principal, Keroven Pillay who I am still waiting for a response from. I’ve been waiting for my spare key since last year June… their service and attitude towards customer service is extremely disappointing.