seriously heart broken right now, ive written my dad multiple times to let him know about my…

seriously heart broken right now, ive written my dad multiple times to let him know about my daughter and have gotten nothing. i walk out to the mail box every day hopeing theres something there. apparently he called my grandma today. she wasnt home so i wont know if hes just ignoring me. just feels like ive gone out of my way to forgive him for so much but i cant even get a letter back for his granddaughter. :/