policy no ***

My name is Victoria Nomonde Mvakwendlu , In 2010 I app**** for a funeral policy at old mutual for my mom. I gave them all the birth date correct details for my mom but on the contract they wrote 13 June 1946 instead of 13 June 1942. I tried by all means to contact old mutual to rectify their mistake and they refuse saying that they don't know how much pay out I will get if my mother pass away . Am unhappy about this situation and I would like old mutual to rectify this