Cancelled contract and still being billed for Vodafone Live

<p>I cancelled my contract, effective at the end of January, due to me moving overseas, and at the begionning of February I was sent an invoice for a Vodafone Live payment of R5, for international dialling on my mobile number. I did have this service when I lived in South Africa. Why am I still being billed this if I don't have said contract anymore?</p>