Disappointing level of service and support

Good Morning, I am writing to complain about the level of service I have received from Platinum Life. I called last week to have my policy cancelled and was advised by two staff members who both assured me that the policy was cancelled. Yesterday, on 2 September 2019, a debit order was taken for the amount of R696 off my account. This was taken after I had the policy cancelled. How can this be legal? To top it off, the amount that was deducted is higher than the usual debit order amount that is deducted from my account every month. The amount that was taken last month was R418.77. How can the debit order just suddenly be higher even after you've cancelled the policy? I want written confirmation that my policy is cancelled and I expect the debit order that was deducted yesterday to be refunded to me. Lastly, I want confirmation that I will never be contacted by Platinum Life ever again.