Vodacom Upgrade *******

My contract upgrade was available in September 2015. In January I tried doing my upgrade on-line so that I didn't have to pay the admin fee, but it kept on telling me that I don't qualify for an upgrade. After phoning 111 they put me through to the upgrade centre ***. There I was told by the operator and her team leader that I, with half of Vodacom's customers, had been migrated to a new system and cannot be upgraded via the phone or on-line, only at a Vodacom store. This means paying the admin fee to upgrade. Vodacom is now going to rip-off half of their customer base by charging them the R150 admin fee to upgrade while the other half can do their upgrades on-line or over the phone for free. Vodacom, you decided to migrate your customers, why must we pay?