Vodacom Accounts messup

I had some trouble with debit orders on my bank account recently but I paid Vodacom towards the end of September as the line was suspended after which they still took a debit order for the whole amount. I have since phoned and spoke to accounts numerous times to make an arrangement for the outstanding fees of the last month to be taken end of this month but this morning my outgoing calls were barred. I need my phone to work and it must please be reinstated urgently. Vodacom also owes me money for the dishonoured debit order when they took the large amount from my account after paying them