Unresolved Complaints and Concerns w.r.t Data and Billing

Since I upgraded to my new Samsung S8, my account kept on escalating. I have been trying to sort my account, billing and data usage since July 2017. When I visit the Vodacom stores, I don't get a conclusive answer. I have been contacting the customer Care line over the last 2 to 3 months, but my query is never resolved completely. One consultant can also NOT deal with my query, it appears that it often have to be referred to more than one person, yet everything does not get resolved. Lately my data allocated disappears and additional data that was NOT requested are added to my account. The My Vodacom app and Call centre information w.r.t. My account and data does not correlate. On more than one occasion the background noise in the call centre was overwhelming. The noise seems to be of a personal nature, as I hear several people laughing and joking in the background. I wonder if that might be why one are always kept on hold or have to wait such a long time before calls are completed. My average time spend on the phone with the call centre is 25 minutes plus. I want my account and data usage to be investigated. I only want to pay for what I have used. Vodacom has a responsibility to ensure accurate billing and complaint resolution. They can also NOT add and take away data without my consent!