Vodacom port and package nightmare

I have (stupidly) just ported to Vodacom after they came recommended to me by my brother (he is on a 79c prepaid call package which works great for him and me if I could get on it). The port happened smoothly on Friday morning. The staff at Vodacom tried to port the physical sim to an e-sim, requested by me. This was a disaster and I was without my primary cell number, that I have had for 20+ years, from Friday until Monday morning. Relieved to get my number back, I tried to migrate to the 79c package, as this was my original reason for porting to Vodacom. Nobody at Vodacom Long Beach Mall branch, or the online call centre, can tell me why I can't change from the default package to the 79c package, but I can't.... My next option to mitigate the high prepaid cost would be to buy voice minutes - but ONLY VODACOM TO VODACOM MINUTES ARE AVAILABLE TO PURCHASE, and once again no one knows why. My experience has been a nightmare and obviously I will be leaving ASAP, but they are now locking me in for 3 months before I can port away from VODACON.