Cancellation of cellphone contract

Autopage Callcentre customer service is non-exsisted. I gave notice to cancell my contract during May 2015 - Ref nr A***. End of contrtact date was 28/6/2015. BUT they still deduct monthly payments. I phoned on various occations to enquire -see the different reference numbers 918750 & 918756 and the last one Ref no 947984.<br> How many reference numbers do you need to cancel a damn cellphone contract. I'm gatvol.<br> They are *****ing my money!!!!!