Leaking car

I purchased a Hyundai Atos at the Hyundai Cedar. Since i bought the car in November, i have informed the sales guy (Therance) that the car was leaking when it rains. I have sent several attempts to get him to book in the car with no response. He asked at first which dates would be good for me and he will get back to me, it is not a month later and i have not received a booking or phone call from him. I followed up twice to ask for confirmation and did not receive a response. I then wrote to Head office about this matter, only to called and made to seem as if this is all my problem. They did not know what the whole story was, when i told them to go and ask Therance, i was met with responses such as: Therance doesnt work here, he works in Fourways. I proceeded to ask them to call the Fourways office and sort this matter out with Therance, my car is now smelling moist because of these leaks, as the customer i should not be having this kind of service especially from a division that calls themselves "Customer Care". I just want this matter resolved and for Hyundai to take responsibility for this fault and fix it or we part ways. It would be highly appreciated for this matter to be resolved Kind regards Thando Mzimela