Vodacom still collecting money after cancellation in Dec 2016

<p>I cancelled my vodacom contract in Dec 2016 and paid the premature cancellation amount of R988.96 28 Dec 2016, when all the documentation were send to them from Vodacom shop Baywest. This month Vodacom collect a full premium of R1157,50 .</p> <p>When reporting it they reply that the contract will be cancelled on 31 March 2017 and the credit/refund request has been send to the relevant department.</p> <p>How long will I wait for my money??</p> <p> </p> <p> </p>