Netstar *****ing from poor people

Can someone please explain to me why netstar is still deducting my money... My 3 years contract ended in August this year and I did call to cancel in September after money was deducted without my consent.. I was told that after contract ends it becomes month to month until you cancel which I did... But today again I woke up with a duduction from netstar and it was a double debit...I've been trying to call this morning and nobody is picking up..i don't want to renew my contract.. I WANT TO CANCEL FOR GOOD... THIS IS SIMPLE ENGLISH. CANCEL THE DAMN THING... who is going to sort out this mess cancel the policy and refund my money... Simple as that.