Vodacom takes money but cannot produce detail statement

Money has been taken off my sons top up Vodacom account. When I enquired from Vodacom where this money went via the online service, it was traced to a subscription. Vodacom cannot give any details of this "Subscription" . I have called the call centre twice since then asking for a detail breakdown of the cellphone deductions and....no response. I spoke to NeoL on the 11 May, and Again Zikona on 21 May who told me her supervisor Olwethu would contact me. No contact received. I have multiple Vodacom subscriptions and get NO service. Extremely unhappy. All I want is a detail breakdown of where my money is going. THAT IS YOUR JOB VODACOM. Please respond