Closed my account 6 months ago and still billed!

Pathetic! Closed my account with Absa 6 months ago, settled all outstanding monies even receiving letters that my accounts have been closed but yet I still get billed for cost and added interest every month. <br> <br> Phone the call centre and promised it will be stopped but now they cant find my account on the system!!<br> <br> One of the reasons I moved from ABSA and will not put in more effort to resolve!!