Cell c charging full amount on cancellation of contract that end on 3rd Augustus

<p>Cell c..... I cancelled my contract a month in advance as required by cell c it ended on the 3rd of August...i cancelled on 3rd of july.... I was told that a pro rata data of my 1gb top up contract Will be hi en to me for the 3 Days in August.... Good and well i stopped using the data at the end of july.... Now i am told by a cell c agent that i have to pay my full contract amount no pro rata...i Will not pay Now they are *****! </p>