When my child's father has come for his visitation and child does not want to go and father tells child you are considered dead to me and recently told child not to call him and he is no longer his father. I know I have to reensure him that he is loved and wanted at our home, but how can I help him get over what has already been said by his father?

Depending on the age of the child, years of counseling, and the simple fact he will never forget and really never get over it.