SECURITY CODE FOR F/F RADIO - NO RESPONSE

I bought my vehicle new from Lindsay Saker Airport in 2013. I discovered when replacing my battery 2 weeks ago that the factory fitted radio required a "security code" which was NOT entered into the user manual supp**** during handover. I've sent an email requesting this information and also attached the vehicle original offer to purchase and also the vehicle registration document. Despite follow up and resending the email (now for the 3rd time) I have had absolutely no response from the Airport Dealership. I did have a reply from the Alberton Dealership who informed me that I would have to bring the vehicle in and pay +- R 340 in order to get the "Security Code". This is NOT acceptable. This is information which should have been provided to me during the handover. Really pathetic as I this vehicle has subsequently been paid up as well.