A few weeks ago (I could confirm the date and time but don't have it on me) I was getting messages from Vodafone, but my replies weren't making it back. It caused some problems.
This morning we were exchanging messages fine, but the last one (the time I was meant to meet her to collect something) didn't arrive. I have exact times for that one that I can supply, along with phone numbers.
I'm not sure if my replies (test messages, not important) are reaching her now. She's not replying, but she may just be busy at work.