No to Old Mutual!!

My recently deceased mother had a funeral policy with Neighbour funeral scheme, to which the under writer is Old Mutual. We made the claim and payout was done. Days after my mothers death, one of the people (my aunt) she insured passed away and was told since I (the daughter) wanted to carry on with the policy, the claim will then be processed. I signed documents and I was approved - Now meaning I am the main member. My Aunt passed away in June 2025. My mother took out the policy years ago from a now dissolved Netlife and transferred to Neighbour! Old Mutual now says they do not have records of my aunt being a member and are dragging payout whereas I have already made my first premium for July!! This is really disheartening and I want to move to another insurance company!! What do they mean they have no records whereas its been YEARS!!??