Vodacom

I cannot believe that a company like Vodacom can tell me that someone in their company is busy with ***** to create falls invoices. As my contract with them is only R692.43 a Month and all of a sudden, they deduct R5595.70 into the Vodacom account? and every time that I am calling, they keep on telling me that they are busy investigating the matter. I don't have money to just give away I am planning according to my budget.