Incorrect billing -***

I have tried since June 2014 to sort my account with Vodacom to no avail. My contract expired 12 June 2014 and I notified Vodacom one month prior to this date to cancell the agreement. The number was transferred to Telkom as I took a new contract with them. I noticed on my Bank statement that they have debited my cheque account wit the full amount of R360 odd. I then put a stop on the payment and had my bank send it back. I send them a mail at customer srvices that they billed me for a full month and not for 12 days. I received no feedback. Then I started receiving letters demanding payment plus costs for the full amount. Again I send mails informing them that if they provided the correct invoice with 12 days billing, I will gladly pay. No feedback received. Today I received and SMS from T&S collection services demandin payment of R600 odd rand. I teied phonong them three times but to no avail.<br> <br> I think that the sservice and customer care provided stinks, and request them to continue with legal action.