Have not received my final bill

I have called telkom numerous times to request my final bill as I gave 30 days notice on the 23rd of February.<br> Therefore my account was closed on the 24th of March.<br> I received a normal bill that charged me till the 11th of April. This was due on the 4th of April. I have refused to pay this as the amounts are incorrect and are charging me past the date that my account was cancelled.<br> <br> I therefore want to get my final bill so I can pay it and finish with this account