Done upgrade without our permission

<p>Vodacom upgrade one of our contract without our permission and we contract them and they could not tell us who gave them to persmission to upgrade a bussiness contract form Red Advantage Subscription to Red Premium Subscriptoin? We sent various email to Vodacom and nobody could tell us anything about the upgrade? The number we are ********** and we want I answer about the problem. The problem is coming form June 2016 to te lastes acount that we have received?</p>