Telkom not honoring their add

Good day<br> <br> On the Telkom website there is a promotion for simple plus. I called in to place an order but was told that I will not be receiving the modem. Although that is advertised. I am upset as mine is very old, and I require a new one. Apparently this deal is only for new customers, why then is it advertised?<br> <br> I would also like to benefit from this deal, why do only new customers benefit? Over me, a loyal and paying customer?<br> <br> Charlene