Welcome youngisabel it beggars belief that having given so much of yourself to help your D, she can treat you in this way.
You hid behind a wall
well not exactly the crime of the century was it. You explained why and her response should have been an acceptance of their thoughtlessness for not keeping pace with you. That could have and should have been an end to it.
IMO to make no contact with you over Christmas because of the incident you have relayed to us is a gross over reaction, totally un necessary and very cruel.
I do not agree with Madgran that there is mutual stubbornness here. Despite your hurt and confusion about receiving no contact over Christmas, you sent your D a text and met up with her. It is not unreasonable for you now to wait to see if she get in touch with you.
It's not just her reaction to what's happened that's an issue, it's also what she's been saying about you to other family members.
I don't agree with Luckylegs that you should apologise for hiding behind a wall. IMO her behaviour has nothing to do with that incident. There must be more to it but you're her mother, not a mind reader therefore if there are underlying issues, she needs to be adult enough to talk to you about them.
"I just do not understand how someone you love so much and whom I thought was my life can hurt me so much"; something that none of us estranged parents can understand.
When you met, was the incident and no contact over Christmas discussed? You say you feel she wants you to grovel but why should you.
Luckylegs is right, you may be upset by what she says but then again, she may feel the same about what you have to say. A mutually respectful and honest conversation is what's needed here, not a grovelling mother.
Good luck.