Shocking service and downtime with Vodacom

I have migrated from a contract to prepaid. Due to issues with Vodacoms system (as told by one of your agents) for the last 2 weeks I have been unable to use voice minutes that I purchased during the migration. I have had to buy airtime and then buy minutes so I am paying extra for a service you cannot provide me. Furthermore your app is slow in purchasing airtime using bank card or Masterpass and I have had a horrible experience with your network.

Please address this urgently or I am cancelling my migration and moving to another service provider who can in fact offer better deals.