petti,
I think you should asked her, of why she can't answer your calls or not replying back. I believe if she hasn't got your text on time because of network problem, I think it will still get there but late. Surely she can text you back just to let you know that how pleased she is and shes thinking of you as well. Make an effort for the relationship to work, thats what we did before even in the middle of the night I still got some few messages from my bf before, my now husband and texted him back that im already in bed and u woke me up, lol..and talk to u later.
We got upset sometimes if we didn't get a reply from each other, and easily utter the word..Ignoring me? hehe silly.
True love will never get tired but appreciate of how much we care. Unless if she got abusive messages or could be theres doubts in this relationship?. Who knows maybe she felt pressure.

Asked her, of whats the real deal. She just can't ignore you and not saying anything else of whats the matter with her recently and that made you curious.