Spare key

In 2018, I bought a Mercedes benz, from a Mercedes-Benz Fountains dealership in Pretoria CBD, I was assisted by one, Isaac Sebiloane. When I collected the car, it was without a spare-key, I enquired from him about this and he said he is going to order the spare key and let me know once it's available. I never heard from him afterwards. I didn't follow up on the matter as I was okay with using the key I had. Now I need a replacement key, I am having to pay for a new one even thought I never got the original spare.

I contacted the customer care line and they advised me to order a new one. I explained that I am looking to file a complaint with respect to the original spare I was meant to receive before I can order a new one. The agent gave me an email; ***edes-benz, which isn't going through