I agree with your daughter. I think she over reacted just a bit. If she was so busy at work why did she answer your call? She could have let you leave a message and returned your call when she had time.

I also agree that there may be more going on with her than you (or her) realize. That is NO excuse for treating you that way for this long. I can see getting upset the once, but to continue with the anger....just doesn't seem right to me.

Just let her cool down. If she doesn't contact you maybe you could contact her in a week or two. A friendly email asking how she is doing, maybe? If she doesn't respond then you know where you stand with her. Which would be very sad if you've been friends since toddlerhood.

I hope all is well with her and that you can squash this little tiff.