Incorrect Billing after cancellation and limit was app****

<p>Referring to case logged A ********** [# ********** 6]</p> <p> </p> <p>The account was cancelled in Aug 2016. </p> <p>I received written confirmation prior to the account that there was a R10limit app**** to the account. </p> <p> </p> <p>For Nov/Dec I then received a bill to R17000+</p> <p> </p> <p>I've been dealing with their legal department with their once every month single line responses heading nowhere. </p>