Debited incorrectly

I have cancelled my life cover with standard bank some time last year and I stated that I can no longer afford the premiums due to financial strain and I said should anything change I will contact them and reinstate or rather the will contact me in January 2022 to see if there's any changes in my finances. I received a phone call from them last week and I did NOT confirm that they should debit my account or that my financial status has changed. This morning I got a notification on my bank account that standard bank has debited my account WITHOUT my permission. I take it as ***** because I did not give them permission to debit. May I request that funds are debited back to my FNB account with the bank charges as well before the end of business today and they might as well remove my details from their system.