Honda Midrand won't give me my money back

I bought a car from Honda Midrand three years ago. A few months later I discovered that the dealership had failed to licence my car so we rushed out to do so. Only after did we realize it should have been included in the new purchase from Honda Midrand. The dealership also confirmed this. We have spent the last 3 years trying to get our money back. Why is it so difficult? I wish I could say that the service we received as customers of two car purchases made up for this issue but far from it. We have had to fight for repairs and faulty goods additionally purchased from the dealership since the day we drove the cars home. I will never buy a car from them again. No return of calls, no return of emails - nothing. In the meanwhile anyone know how to get our licence costs refunded?