Being charged out of date rates when my data has not even been depleted yet

<p>I have a router contract with vodacom. For the month of june and july 2017 i am being charged out of data bundle rates. This is impossible as i monitor my data on the vodacom app and i still have data carried over from may till june for the billing period for july. I contacted vodacom about this and the consultant herself checked on the system that my data was not depleted and carried over. So why am i being wrongly billed. She logged a query in friday 9 june 2017. Today 12 june 2017 i received an sms stating the query is closed and resolved and the data was used and i should monitor mt data usage on the app . i have been monitoring my data monthly and have never gone over or depleted the data. I have screen grabs and dates of my data usage as proof. Can vodacom please refund me and RESOLVE this incident as it is still ongoing!!!</p>