Expired Voucher

I contacted DSTV regarding an expired voucher I received on the 31 March via email. I still have the email as proof. When attempting to use it on the Kalahari website on the day it did not work! This is false advertising. The Consumer Protection Act is clear about voucher expiry dates (which I mentioned to both the DSTV agent & Kalahari). I find it disgusting that DSTV is not willing to sort out the matter. I have to wait for ages to get a response via email and when I phoned the call centre I was told that I could only contact the Magii Explore team via email. An agent, (name omitted), eventually responded after numerous emails, his response (in a nutshell) : thank you for your loyal support over the years ... But THERE IS NOTHING WE ARE GOING TO DO! This is unacceptable!! Thus my further request to be contacted by a manager. I merely received the same generic email, there is nothing we can do! SHOCKING! I also contacted DSTV via email explaining the situation, after several emails requesting amongst others Smart Card # etc, which I provided, even after querying the relevance?? I have not been assisted ...Even after following up... What a waste of time!!