Defective products provided with no refund

We paid this company for prints about a month ago. He delivered prints with black spots on it. We requested reprints but he said he had a problem with his equipment and that he would refund us. He has been ducking us and has not refunded us to day. His registered address is Premier FMCG Head Office. I arrived there to possibly see him but they said that they are not aware of the existence of this company. I called him thereafter and he said that he operates from Joburg CBD and that he would refund against a refund form. He has ducked us to date. This is really unprofessional and pathetic!