contract cancelled

I`ve send you an email to inform you that I will not be renewing my contract when it expired in October.i received an email today stating that I owe you money for nov-feb while this account should be closed.<br> I have not used this contract for 20 of the 24 months that it was supposed to run because of your uselessness.i resend the email to this fool [Email Removed] .please do the right thing I don`t owe you a sinlge cent I don't even won`t the minutes and data that I`ve paid for over that last 18 months because your service is disgusting.