Momentum multiply poor service

I bought vouchers to the value of R3000 from multiply on 15 March 2016. My credit card was debited immediately and 4 days later I still have not received my vouchers. I called them and they promised to call me back but did not. I contacted them on Twitter and Facebook. They insist there are no vouchers outstanding on their side. I find this attitude unacceptable seeing that they are sitting with my money. Their product is far behind discovery vitality and we sign up to them because our medical aid is aligned with them but I would even go to the length of leaving Profmed in order to get a loyalty scheme which offers customer service, honesty and customer satisfaction. Momentum multiply is disgusting.