They don't care about customers after receiving money

I purchased havah h2 madza hatf**** Midrand in November,which after two weeks the car started showing me endless problems.i ask my husband to take it to the dealership for repair.which later on that day my husband was called to collect the car as it was fixed.the following day on my way to work the car started again and this time it was worse.which I then ask my husband to take it back again.then the technicians said the is nothing wrong with the car we are wasting the time..and I refused to take the car and ask for refund and cancellation.the manager Pieter De Lange agreed to assist me with refund he even gave me option which I refused.same day I even get notification of settlement and paid up my account which was not done.when I call him to follow up to my greatest suprise he change what we agreed on and said he is not going to cancel nor refund but he can replace the car.which even today I don't have a car.and the most heartbreaking part he's no longer taking my calls nor return them.im frustrated I never expected this kind of treatment