Unfortunatly it happens to a lot of us once or twice. my advice would be to move on to the next and take off the to do list. i have had a few well known providers do the same to me. luckily they have been incalls and not forked over for a room.
I thought I was going to get NCNS today. I texted the lady a couple of hours ahead to confirm our 2 pm and never heard anything back. It is about 10 minutes before so I text again and right away PM also. She responded to the PM saying she did text me back. Anyway things worked out and I finally got the text at about 3:30 and it was time stamped at 1 something.
Good to try PMing or calling if the texted isn't answered you just never know.
Looks like you called too so that sucks. Just wanted to get the info out though that sometimes texts are not that reliable.