Vodacom Data package upgrade failure

We have received absolutely useless service from Vodacom with regards to upgrading our Business internet. We have been talking to T**** since September. We have been told that our routers will have to be changed to activate the upgrade. Vodacom sent the routers, one of the new routers is working but is still on the previous data package. The other new router is not working at all. One of the old routers are still working also on the old package. No body can explain this to us and no body is coming back to us with a solution? Please can we get assistance??