Dragging To Reply

I have since send the Nedbank Personal Insurance on this email [Email Removed] to cancel my Personal loan policy as I have a policy which covers me for death, disability, critical illness & retrenchment cover amounting to 12 months installment, which I sent to them together with the Cession document. The initial email was sent on the 10 Sep 2015. I then followed up on the 14 Sep 2015 still no reply whatsoever from Nedbank Personal Insurance what is worse is that the email doesn't at least have an auto reply informing the client the turnaround time or whether clients request was recieved or not .What can be so complicated about canceling a policy. The only thing they are dragging just to keep on taking my money for a policy I no longer need - please cancel policy with immediate effect and confirm once done.