Misinforming clients

I put in a claim on my funeral cover with them in April 2018,till today only part of the claim was paid.old mutual is sending me from pillar to post though according to the information that I was given when opening a policy with them I have submitted everything that was needed.now they tell me that I must submit a post moterm report which I was never told of when opening a policy that should there be an accidental death they gonna want it.I feel that I was mislead or misinformed as a client and that is not on .They must be truthful about the information they give us as clients that are paying our hard earned money hoping that old mutual will help us in times of need.I am now busy spreading the word about the poor service and dishonesty of the employees of this company.I am also cancelling all my policies with them,as they have clearly shown me that I'm not that valuable to them,especially at the time when I needed them the most.Bye old mutual you have lost a client and I promise more will follow starting with my family,friends and colleagues.