Disappointed Hyundai client

I bought a 2018 Hyundai i20 in Hyundai's Benoni branch in November 2019. Till today I haven't received my spare key from Eric Mduduzi, who was my salesperson. I try to call him, WhatsApp him, email him but I've been ignored for two years. I'm really disappointed in him because I bought my first car from him and even brought a client to him. I don't know what else to do to get my spare key. Can management from Hyundai intervene? I need my spare key.