Not happy with the service received in complaints unit

Las year in November the 15th my dad passed on, i claimed from oldmutual on the 17th November for my dad's funeral and the pay out was done on the 21/11/2023, in December I received my salary advice, the November and December premium deduction was still the same, the amount should have decreased because my dad is no longer on the list of people covered. I sent couple of emails to old mutual enquiring how is it that they deducted premium for deceased person, i was communicating with Michael Swart "He said Our record do not reflect a premium being received after date of death"

Please provide a bank statement reflecting the deduction you are referring to, or alternatively, please confirm the debit order amount that was deducted in order for me to investigatye further..

On the 13th January I sent 3 of my salary advices showing the amount deducted via stop order for November, December and January and that of January being the corrected one, im still waiting for them to resolve the December issue, up to so far i haven't heard anything from him since submission of documents he requested as proof that they deducted same premium as that of November in December as it was supposed to have changed. I don't want to lie, i have been with old mutual i never had any problem until this incident. No one is updating me on the progress of the investigation been calling old mutual with no success.