I'd wait a couple of days and then call her back and see if she wants to go out to lunch. It was wonderful of her to call you and the fact that you were on her mind is good, too.
Now, about call waiting. I HATE call waiting. I find it extremely rude. We had it installed when we had one phone line and three teenagers. That was the only way my husband and I would have received our calls in the evening. I didn't get it when I moved to Florida but I just went with a package deal rrecently and it included call waiting. I tried to have it shut off but they can't do that since it's part of the package. I never use it unless I'm expecting a call from my doctor and I also let the other person know I might have to get off quickly. That's the only time I use that feature.
I had a friend that kept doing that to me. It makes you feel like you're not important....that the unknown caller is more important. I don't think people realize just how rude that is. Anyway, this friend did that to me one time too many and I told her that if she cut me off like that again, I would not talk to her on the phone except to make arrangements to go out to lunch. She is always calling me for information about one thing or another and then I'm cut off. So, she isn't doing that to me anymore.
I can totally understand why you have hurt feelings but, as I said before, I don't think people realize how rude that is.
Sherrine