Bad service and invalid netflix promo voucher.

After consulting with Netflix I was informed that Telkom Sa had a promo where I can try the services for free for 3 months total to the value of R419. I searched on Google found the voucher redeemed it and thinking it was working I got disconnected after a week. Then tried contacting Telkom no help just Googled the voucher again and it happened 3 times over 3 weeks now I went to look for the voucher link again and it's gone. Why promote something that is not working.