Cancelled contract ... or did I?

<p>I cancelled my tablet contract by calling the contract centre and was advised my contract would not be renewed, that the contract would not move to a month on month billing contract. My SIM was also canclled. I would be debited for the month of March but on the 4th of March my agreement with Vodacom was no longer in effect. Except now I notice that I received data which should not be. So, did I cancel my contract or is this an error on Vodacom's side? </p>