Pathetic/No service with Overdraft Cancellation

I’ve been trying to close my overdraft for over 2 weeks now to be able to close my Absa account! After signing and sending back the document needed, I received a mail back saying they tried phoning me, I didn’t answer so they are closing the case! I had ONE missed call from them! They requested I must send the signed document again to be able to close the account. I have done that 3 times again and STILL haven’t received a call or mail, nothing!!!! I want to close the account, but looks like Absa just wants another month of ridiculously priced banking fees, interest rate etc out of me before they will close it! Pathetic service!!