Can't provide a service, read OR count

Most *********** bunch I have come across in a LONG time. They cannot 1) Provide a service or 2) read. I arranged to cancel my contract because I MOVED apartments, waited out the cancellation period, begged them to come fetch the router and then they continue billing me months later? When asking them about my line being cancelled, they just send me the mail of "please note there is a 30 day waiting period for cancellations".... Yes there is....but it has now been more than NINETY Days...seems in addition to them not being able to READ they cannot COUNT either.