No invoices and data

My contract has been high for two months. I do not receive a bill as i do not have itemized billing on the contract. I called the call center 3 times yesterday for the past 3 months invoices to be email to me. I have not received any of these invoices but i have be charged 3 times as i can see on the my vodacom app. I called again today to find out. The customer care person says the first time it was sent it was sent to the incorrect email even though I made a point of reconfirming the email a couple of times on the first call. Then she informs me that they were sent in the MMS format and not PDF. I have paid for invoices I have not received. She said she will send them again and I will be charged for the 4th time. I told her I cannot accept that, please put me though to her manager. The manager then informs me that they are having email issues. I need to get my invoice to check why my data charges are so high. The customer service is shocking and but are quick to charge my account for their errors. I need someone at Vodacom to sort this out ASAP.