Bad Service

I bought a audio/video sender that was marked for R429.00 at the pay pointed the product was put threw for almost R 900.00 . I informed them that this was not in accordance with the consumers act and that I was going to pay the price that it was marked for. After a long debate I paid R499.00 .when I got home I tested the product and the product did not work ,I phoned the customers assist line ,who informed me that the set up was correct and that the product is faulty I returned it to Greenstone Aerial where I was informed by the staff that they did not know how to test it ,and that I should ask the technician to test the unit . I was advised that the product was faulty ant that I must return same . <br> I returned the product today and advised the staff of the technicians remarks I was then informed by Kim that they will test the product them selfs and if it is faulty they will send me a new one . <br> I recently received a phone call from a lady working at Aerial Greenstone who advised me that they will send out a technician to test the unit and i will pay the costs again. i have pointed out numerous times the product doesnt work they refuse to assist me and keep saying they will phone m