Billing issue

In October I went to the shop to upgrade and the consultant assisting me was very nervous, I then asked her to load on the number .....4066 a 100 MB per month - she then did the request and told me - she is going to do it again, because she don't see a message on her system confirming if it was successful. Everytime I call the call centre - the agent says they will deactivate it and send a request to accounts to refund me the extra R29. but I have informed the agent - please email me rather as I am in a call centre and can't answer my phone. I want this resolved urgently.