Account not debited

I have been begging Vodacom to debit my account since last week and after nemerous calls I was promised my account will be debited on the 11/01/2016 to date nothing has happened instead I get messages that my account is overdue.<br> <br> Most frustration is that I use my line for business and services can be terminated by Vodacom at any time due to the amount due as the result of their poor service.<br> <br> I have spoken to different call centre agents and no can explain why my account was never debited in December including their own accounts division.<br> <br> I am now desperate as I cannot afford my line to be suspended.