Remember you can always call the ABA for support & advice also - 1800-686-2-686
You can try a shield, sometimes it helps to get help with sizing & getting them on. Also different mums find different shields work better for them (I tried avent & medela, and the medela ones were much better for me, for eg). There are also certain tricks that mums with large breasts find helpful - maybe ask here specifically, also the ABA can probably give you some tips to try.
Do you wear your baby at all? A sling or carrier can be extremely handy with a little baby. Also lying down in bed together to feed & rest - it's convenient multitasking. Just having some nice snuggle time without the pressure of trying to feed can help to overcome refusal sometimes.
At this stage it's most important to get milk in baby (even with intermediaries like bottles & nipple shields). Even if she's refusing and fussing now, doesn't mean you can't fix that later.