Bill for cancelled contract

Last year October I sent numerous emails to Autopage to cancel my Cell C contract I have with them. In June they phoned me to ask if I would like to continue my contract. I rep**** NO, because I am under debt review. Last week they phoned me with a outstanding bill of over R1000.00... <br> <br> I do not even have a sim card or phone for this bill... I only use Vodacom... How is it possible?<br> <br> If anyone can help me please let me know...