Can't even call my Wife...

Since my upgrade, I have not been able to call my wife. I have logged many tickets with Vodacom however they keep closing it without actually doing anything. They said that a reset of my line would fix it... I could call her once and then back to Whatsapp calls. Then they said that resetting my wife's line would fix it... 2 calls and back to Whatsapp calls... It is frustrating that I have this expensive phone that can do almost anything except call my wife... So we are back to Whatsapp calls and if the signal my town was any worse... I would not be able to call her at all.