****** that added license & registration fee on my car finance but refusing to refund me

I bought a Suzuki Swift 1.4 GLS 2013 from Mitsubishi in East Rand sometime in June 2020.I am so disappointed by the lack of communication from Shane Walters, who is the sales person he never bothered to make any contact with me once the car was in Cape Town. I had to be the calling him to find out out the car registration documents and he promised to e-mail and almost 6 weeks passed without any word from I decided to give him a call and that is when he sent the documents. He told me I will be refunded for the registration expenses. On the MFC car finance document they have added R1850 for car license and registration. I sent Shane the roadworthy invoice of R440 and he did not bother to respond to my e-mail. I decided to send him a whatsapp after 2 days, which was also ignored.I called and left messages for him and he didn't not make any effort to contact me .I decided to call his manager who is Jaco last week and I explained the situation and he promised to call me back and he never did. Now my questions is why I'm given the round around when they have to refund me only R440,which makes me wonder why I was over hanged in the face place, because to do the car registration is R485 and roadworthy is R440 so what happened to the rest of the money?I don't even want to mention that the car tyres were worn off and I had to buy 4 news tyres and when I sent an e-mail regarding the tyres my email was ignored.