Pathetic service and misleading promotions

Russell Hobbs had a promotion whereby they gave some entrants a R100 voucher off a purchase of their products. I was one of them. When my voucher code didn't work, I complained via email and on social media. They keep saying that their head office will get back to me. It's been over 2 weeks now and I am still waiting. A good company that cares about it's customers would have given me a replacement code long ago.