my cell c contrct

<p>i have a contract with wich is ending on the 24 of june, i have not been using my sim card since last year april cause my contract phone was broken and i distroyed my sim, i was shocked when they billed me more than my ussual amuont, i logged a complaint with their customer care, after they did some investigation they said i was at fault cause apparently i was still using my sim, when i know for a fact i destroyed it. to cut the story short i need them to tell me how i used up all my data without my sim.</p> <p>&nbsp;</p>