Prepaid client yet account in arrears

<p>I am very confused I am a prepaid client of Vodacom, and I wanted to do a balance transfer last week 6 March 2017, and the error said I did not have enough to do the transfer, even thou I have. I went to a vodacom store and was informed tht there is a prelegal note on my PREPAID account. This is very weird as I can owe on a prepaid cell number.</p> <p> </p> <p>Please may I have clarity on this.</p>