Funeral cover claim

My husband had a policy with old mutual . A funeral cover for his mother. My husband is deceased. He put me as beneficiary. Now they telling me that the birth date on the policy and death certificate dont match. Its not true BECAUSE i have the policy it matches. Another reason why they are recalculating is because my husband is deceased. Im not happy at all. Another thing they telling me the claim will take 10 days. And this weekend we supposed to burry. Now im supposed to post pone BECAUSE of this situation. When they were debiting money we never gave them problems.