*****/**** cellphone account debited from my bank account

Early January Vodacom added an account on my invoice which was not my account. I phoned them, informing Vodacom of their error. I was told that I had to supply them with an affidavit that the account was not mine. (Where is the days where they had to show me the proof of that I signed for that contract). Any case I supp**** Vodacom with the Affidavit 18 January 2018. I made numerous phone calls to Vodacom to find out that the error has been fixed, and with the same feedback every time that they still investigate the issue. Well this morning I woke up with the shock that the ****/false account was debited from my bank account. WHEN will Vodacom wake up and fix their own fault?? I am not in a financial position to simple just lose R1400 from my budget. The reference number I received from Vodacom is EC-1J3U-19144K