Funeral Cover Pay-out

I took a cover from 1life in March, for myself and my brother. On the 1st of August my brother passed away and i informed 1life. They obviously said they couldnt pay because the policy was 5 month old but to my surprise they debited my account on the 25th of August 2017 and again on the 22nd of September even though they were aware of my brothers passing and i had provided them with his death certificate. When i asked them why they continued debiting my account they cancelled the whole policy. Now i want them to pay the whole insured amount because they continued debiting the account even though they were aware that they should not be making me pay for a person who is already deceased.