No idea what Customer Service actually is

I bought a brand new Haval Jolion in March 2022 and paid cash. I salesman - Ambrick, then asked if I could arrange to register the vehicle in Johannesburg and he would arrange for me to be refunded the cost therof ( as I had already been charged for registration costs with my initial purchase price). Months have gone by, and Ambrick is always giving me stories, said the payment was made into incorrect account, but he can't send me proof of payment. It is now 5 months later and I am still running after these people for my refund, which is ridiculous!!!