upgrade at telkom mobile

It's been 2 months now we try to upgrade my husband phone by telkom mobile. Greenstone store and montana they say out of stock and only take your number and will call when they have stock for samsung s6. And call centre say must go to the stores and facebook hr have mouth full of promises and will call us and till today from 19 October 2015 my first complaint on facebook they don't call us. And before i complaint on facebook we wait more then 4 weeks from the shops to call us. Stand hour in the line just to say they have no stock and only take our number. So bad customer care service at the shops and telephone and facebook. Full of promises. I'm really angry