Alllife ****** me for my late dads insurance claim

Very poor service. My dad had a funeral policy which I was paying for around 6 years to pay out for a Natural cause of death for which i was the beneficiary. As he got more sick Alllife changed it to a Accidental death policy . When I queried they said that he didn't send them medical reports but they didn't inform anyone and my dad had got dimensia. 3 months before my dad died I was unhappy with Alllife's service and I cancelled their service in writing via whatsapp which was September 2021. In December 2021 my dad had an accidental fall and fractured his hip. He had a procedure in hospital and was discharged on 24 December 2021. On the 27th December he had an accidental fall from his bed where his hurt his hip again which was bleeding but the bleeding stopped later that evening. On the 28th December he past on. I found in January 2022 that Alllife was still taking out the debit order fee for the policy. When I contacted them they quickly offered to pay me from September 2021 to January 2022 for compensation saying that it was an error. So I asked if the policy was still active and they said yes. So I decided to claim for a Accidental Death policy as they changed my dads policy and it was active and my dad died from the damaged to his leg and body due to his accidental fall. Allife asked for all necessary documentation and I submitted. They sent an investigator from a private company who came to me and my dad's family who took care of him and took statements and recordings. When he left he said he had awarded the claim to me. But months went on and around the end of November 2022 someone from a company called Centric called saying they represented Alllife and my dad's policy failed due to medical reports not submitted etc while they took out installments. I called the investigator from the private company fir Allife and he claimed that he had approved my dad's claim and he will get back to me after he takes it up with his Headoffice and Alllife. Since then I took Allife up to ombudsman and still waiting reply from private investigator for Allife