Contract cancelled but still debit my account

<p>Please help. I have cancelled my vodacom account on the 3 March 2016 since the contract came to an end on the 3 April 2016. I did give one months notice to cancel the contract. I took out my contract on 3 April 2014, but Vodacom has debit my account for 25 month. I have proof that I cancelled my contract on time and their was no need for them to debit my account for 25 month. I tried to get a statement from when my account started, but they are unble to provide my account statement as they said they do not have the records. They have debit my account for the second time now again after I have to reversed it the first time. They debited my account on 2 May 2016 and again 2 June 2016. What should I do. they have now charged me 14.9% interest and my accout is paid in full for 24 months.</p> <p> </p> <p>I am afraid it will give me a bad credit record.</p>