Purchase spares

I was the happy wearer of Oakley sun glasses until December last year when the nose piece on my glasses broke. This had happened before and I went to a shop in JHB to purchase a new one only to be told that they no longer kept spares and I needed to log a call with Sunglass Hut who would ensure that my problem was resolved. As per the instructions I logged a call on the 4/12/***with follow-up mails on the 7/12/2015 and 1/1/2016. I received a response informing me that the incident had been passed onto a Natasha Pillai. Till today this lady has not contacted me. I then logged a new call on the 5/2/***with follow-up mails on the 9/2/2016 and27/2/2016 with no feedback at all. I then decided to contact Oakley directly at the Argus Expo. A lady by the name of Melani promised to sort the issue out for me if I mailed her the week after the Argus, which I did. Again with a follow-up mail today with no reply. The service is shocking as all I want to do is buy a new nose piece. Hopefully I will get a response and be able to buy the spares. I have made contact with Oakley at the Argus Expo and they have promised to sort this out, but so far I have not had positive response.