Terrible service

I have been a client of Vodacom for more then 15 years. They called me last week to do an upgrade on my data sim but for some reason my prepaid Sim has been affected I cant receive any calls since this upgrade was doen after a week of struggling I decided to do a Sim swap yesterday and today they tell I need to recharge my Sim with a cash bought voucher to activate this Sim card and only then they can assist me I am so so fed up I need to settle my contract with Vodacom and find another network because this is absolute nonsense