Global Life Insurance Company review: Life insurance policy

Yes my mother in law was 72 and didn’t have any health issues until 6 weeks before she passed from stage 4 cancer. She was diagnosed with it 7 days before she past away. It was a very rare cancer that routine blood work would not show. Also she had servals other test done and they done an ultrasound and nothing showed up. They done a full body scan 10 days before she passed away. My mother passed away 2 years prior so she was the only person that could help me. So we set down and paid for serval policy’s just for her because she didn’t want us to pay for her funeral. All life insurance policies was denied and no pay out at all. Please help figure this out because her health was very good up until 3 weeks before she passed.