Old Mutual still putting through debit orders on policy that expired 2 months ago!

My policy matured on 1 July 2022 and I have received the proceeds. Old Mutual put through a debit order for a premium at the end of July 2022 for this policy that no longer exists. I advised them accordingly and after some serious to and fro'ing I got confirmation from them on 15 August 2022 that the refund for the incorrectly withdrawn premium was in the process of being refunded (I still haven't received it) and that the debit order had been cancelled. Not so - they have again put through a debit order for a policy that does not exist - how? Is it going to take at least another 6 weeks to receive what is now 2 premiums taken from my bank account for a non existent policy? I'd hate to imagine how many people this has happened to, who haven't noticed that deductions are still going through for policies that have matured, as Old Mutual certainly hasn't noticed that they put through debit orders on my policy that matured 2 months ago. I haven't received any communication from them pointing out that they have noticed this error and will be refunding the funds that they now hold and are unable to allocate as there is no policy to allocate them to.