Detailed Audit Required

Over 2 weeks ago, we queried a couple of monthly invoices we received from Vodacom.<br> We have a 2GB data package, but in December and January, we received a bill for R2500 and R4500 respectively. <br> When looking at the statement, it shows that all charges are occuring at midnight. Sometimes as much as R500 per night.<br> <br> We need to know urgently what is causing this and how we can prevent it so that this does not keep happening.<br> <br> Please provide us with feedback asap.<br> <br> Reference number S3-8U721-1J91A