Unum demanded I give them my children's money without ever telling me I would have do to that

UNUM has paid me 60% of my income for the past 5 years. I worked 1 day/week (prior to glioblastoma brain tumor I was full time). My job was eliminated and after 6 months of no employement, almost insisted that I apply to social security. I did but was denied. They insisted that now i needed to go back after SS and gave me Genex as a representative on that. I was then APPROVED of SS and I understood that from Oct. 2009 through present that money would go back to UNUM. I agreed on that. Shortly after approval of SS, the local SS person called to talk about my children and their potential benefits. 3 of my children were approved. NOW UNUM says that I have to give them my CHILDRENS’ money. This was never mentioned to me and for that matter before SS sent me letters I didn’t even know my kids could be eligible.