Does not want sales

Why is it such a mission to upgrade? I've logged 3 upgrade tickets in the last 2 months. Nobody has contacted me. Finally found a number I can phone, and they don't stock the device on their website anymore. Finally decide on a different device, phone again. Wait 30 minutes before they answer. Then they hang up on me. So either you phone me to upgrade, and you better not say you don't stock that phone anymore or I cancel everything with Telkom.