Vodacom sold me a contract that doesn’t exist

My Vodacom contract was due for upgrade and on their 3rd sales call I agreed. My existing sim only package which included both minutes and data had a special offer on it and the consultant told me with their newly implemented system my existing contract would cost more going forward. I recently retired so this did not suit me. I asked for another option in my price range - long story short I was sold a package that does not exist - in addition I now have a data only package and on the Vodacom system that the service consultants use I have both minutes and data - they are not able to load the minutes onto what is now a sim card converted to a data only card - I have now spoken to 5 different departments all who have attempted to assist but are not able to - it took me three days to get through to customer service to try and resolve this - I need a senior person who has the ability to genuinely assist to call me to resolve - since Monday 1st Nov II have been put through to upgrades/retentions/after sales support/ retention sales none of whom are able to assist - I have a phone but am not able to load airtime or make calls