Rejected funeral claim

On the 01/02/ 2025 the deceased cousin was ****** by several unknown suspect(s) according to the detective in charge of the case, Sanlam called the deceased brother as well as the sister who are now the deceased living siblings, as confirmation of the deceased relation to me as the policy holder the relation was confirmed by the brother and sister as to that our late mothers were indeed half siblings as my grandfather who is also late had many children, now they said I **** about my relationship to the deceased but the same Sanlam paid out a policy in 2022 July taken out for the deseaced mother by me, the relationship was confirmed as her being my aunt, the only difference is that her death was natural, want I want to know how did the relationship change from 2022 to now that I am lying when they have to pay double for the policy, Thank you for your assistance..