From your description it sounds like your daughter has nipple confusion and that has caused a nursing strike.
You can read more about nursing strikes here: http://www.kellymom.com/bf/concerns/...to-breast.html
You can read more about nipple confusion here: http://www.askdrsears.com/html/2/t022400.asp
If your goal is to get your daughter back to being exclusively breastfed, you should probably stop all bottles now
. That doesn't mean that you should stop supplementing if she continues to refuse to nurse, but it does mean that you should use an alternative method of feeding her either EBM or formula. Here are some suggestions for alternatives to bottle feeding: http://www.askdrsears.com/html/2/T026000.asp
It is not great to supplement with formula, but it is necessary if your daughter is refusing to nurse *and* you have run out of EBM. I have absolutely no clue what brand of formula is "better," but I do know that you should boycott any made by Nestle. Here are a few suggestions on how to maximize pump output in order to avoid supplementing: http://www.askdrsears.com/html/2/T026000.asp
Hang in there. It is totally possible to get your daughter to nurse again. A good friend of mine had a similar situation when her son began daycare and she was able to resolve his nipple confusion and get him back to the breast.
If I were in your position, I would eat a lot of oatmeal (boosts milk supply) and drink lots of water. I would spend a lot of time in bed with her cuddling and offering the breast. Spend as much time as possible topless with your daughter held against your skin in a diaper. Taking warm baths with her may also help encourage her to nurse. It may also help if you can pump a little to stimulate your milk let down and then attempt to attach her to the breast when the milk is already flowing. As long as she is still not nursing you should supplement with formula or EBM, preferably in a cup, dropper, or some other method that does not involve artificial nipples because it's much harder to persuade a cranky, hungry baby to nurse than it is a reasonably content one. Try offering the breast *before* she seems really hungry.
Hope that this helps. Your pediatrician might also find a physical cause that is making her not want to nurse and once that's resolved she might happily resume nursing.