Reading between the lines of your post, it seems like you and your ex were judged to be unfit to raise your little girl so his parents came to her rescue. They became her parents by adoption. As her parents, they have decided that it is best for her not to have contact with you -- until they change their minds about you or until she is an adult and can make such a decision for herself.
But you want what you want, right? So you're sneaking around having secret phone calls and private meetings with their daughter. You're telling her that she belongs with you and you are going to get her back. You're asking her to sneak around and to lie to her parents about it. I wonder, are you also telling her all about how they "stole" her from you?
It's clear to me that you are still unfit to be a parent if you don't understand how wrong this is. At this point, I wouldn't even suggest that you go to her parents and ask them to reconsider their decision to close this adoption -- because, personally, I think you've demonstrated that they had good reasons to do it.
see you judge someone when you dont even no the situation my daughter wasnt taken from me for being unfit lets get that straight,me and my husband now ex,my husband was being sent to iraq i was going to be left alone with 4 children no help at all i dont have a family,so my husband asked me would i be willing to let his parents adopt our daughter(open adoption)so we talked about it for awhile and decided we would as long as we could see her and spend time with her when we wanted.i got to see her everyday and she even stayed with me most of the time until my husband got back from iraq and a year later we were divorced,i still got to see her up until a year ago when i got remarried and so did he,he still gets to see her but they wont let me see her because we arent dating or together anymore,keep in mind we have 3 other children together that i have full custody of he has visitaion but he has never showed up for visitation ,but he still keeps our daughter all the time,so please get the facts straight before you want to put someone down,i do get to see my daughter on thursdays at school for about 1 minute,and also the only reason i posted this and she wants to come home because her grandparents are abusing her she said she has told her father but he said that he isnt going to get involved because they are his parents and he doesnt want to hurt them!!!