Contract activated without owners knowledge

What is happening at Vodacom. A contract has been activate on my wife's account and R300 has been deducted from her bank account without her knowledge.When trying to query this with the call center, she was advised that she need to verify the contract details first before they disclose any info with her. How on earth is she suppose to verify details if she ddnt apply or gave anybody the authority to activate a contract nor allow them to debit her bank account. She's been on hold for an hour and dropped the line when they refused to let her speak to a manager.She is currently unemployed and taking her money without her consent is *******. Can somebody please investigate this AND RETURN HER MONEY IMMEDIATELY.Oh she is and has been on prepaid for over 10years.