Apauled -Autocity Hyundai Heidelberg

I bought a Mercedes Benz Vito Tourer Pro from Autocity Hyundai Heidelberg towards the end of March,on the 26 April I had a trip and my tyre got a flat tyre 8km outside Greytown,in an unsafe area at 8pm, due to the mechanism for the tyre being broken I was unable to change the flat tyre as the spare wheel mechanism was not releasing the spare tyre,I was stuck in an unsafe are and tried to drive to a safe spot with my flat tyre , damaging the tyre and rim even further, I had to then call a tow truck which only arrived at 4:38am the next morning,I had to pay a towing fee of R6300,get a new tyre and rim for R1500 and pay a mechanic R350 to repair the spare tyre release mechanism. I feel that I should be refunded for all the money I spent to get the vehicle back home because if the release mechanism for the spare tyre was functional I wouldn't have to spend so much and feel that the dealership is liable for those expenses ,worste of all I reported the matter to the dealership and till today no one from management has called to offer an apology and reimburse me for the money I had to spend unbudgeted. Whenever I contact the sales person she say she is waiting for a response from management and then dead silence until I contact the sales person. I now demand a full refund of all expenses or I will go to the ombudsman if I don't hear from management within 48 hours.