It wasnt her place to tell my child off or upset her. - it most certainly was if your DD gallumphed around, trod on her foot and then didn't even apologise. 
It wasn't your place to apologise for your child - you should have made your child apologise. You clearly backed your DD up despite the fact she did actually physically impinge on someone else. It doesn't really matter if the woman was in pain or not. Your DD was in the wrong
And you didn't make her apologise.
You sound like a precious parent who will defend you child no matter what she does.
I hope she doesn't turn up in one of my classes in future years when she is a teen. Parentys who defend their child at all costs end up with real problems. Fact.
I expect you will be one of those parents who backs up their child no matter what:
"But we weren't taught that stuff" - you were (see evidence in every other pupil's notes)
"She picks on me for nothing" - no, your child is disruptive, see the recorded referrals.
"Mrs Trutta isn't Mrs X - I like Mrs X better" - that's as maybe but Mrs X has left. Deal with it. Move on.
I have had the pleasure of dealing with several parents like you (at Secondary) whose teens can do no wrong. They rarely attain much because they think their parents will always be there to get them out of trouble.
I dare say they never had to apologise when they were young either.