Bokamoso Burial.

My aunt's grandmother passed away at the age of 90 (Lizi Ditsela). My aunt claimed but her claim was rejected as they say they said her she was over age. They did not specify the age limit when my aunt joined and they where still deducting money every whereas they knew she was over age. She joined in 2012 and they where still deducting . I want to know what would be the way forward.