Ahh that's good! You say on the day of the date she didn't reply. That's when you have to arrange, follow up on her for the date. Also you don't have to keep the conversation constant and you can leave it for a few days.

And about the phone sex and shit, IN MY PERSONAL EXPERIENCE, those girls who go OTT over text, snapchat, phone always seem to be the ones who flake or whatever. Maybe they feel to nervous to meet someone sober on a first date (Which girls always hate, at least beforehand) after having all that happen with you. Its always the ones who are, and when I am, most casual, with a little flirt here and there. Who knows if that's actually the reason or not but it seems to be with me.

So yeah, all I can see is you need to follow up a bit harder on the day, and realise you done have to constantly keep up a conversation over text. It can be left for a day, two days, depending on when the date is going to be. IMO