OP this was very similar to my situation 2 weeks ago. DD was delivered slightly early (37+5) by c section due to me having preeclampsia. She wasn't remotely interested in feeding & the midwives & breastfeeding support workers in hospital tried everything to get her latching & couldn't, so suggested we bottle feed ebm. We started this at 3 days old.
Unfortunately dd lost too much weight & became jaundiced so we ended up back in nicu at 5 days old. While there, the staff offered to help me re-establish breastfeeding. However, she became extremely distressed whenever she was placed anywhere near the breast & would arch her back & pummel it with her fists & scream. Rock bottom was a 2hr session with the bf support worker trying to help me with dd screaming & me sobbing. In between trying & failing to feed her & expressing every 2hrs I was exhausted & ready to give up.
That night a really lovely nurse suggested we try feeding laying down as this might remove the stress factor. We started with skin to skin & then I laid her next to me, nose to nipple & waited. She latched on by herself, perfectly, with no pain or discomfort & she fed. Because we were both relaxed.
If you haven't tried this yet I would definitely give it a go. I found after a few days of laying down feeds, we were able to sit up to feed, although we still struggle on one side.
We aren't out of the woods yet, dd is a bit of a lazy feeder & I think having used syringe, then cup, then bottle, before getting her to the breast has worked against us as she expects it to pour into her mouth instead of having to work for it. She also now has a chesty cough & isn't feeding well. I have become sore so have done a few formula feeds & am currently contemplating expressing & bottle feeding (if I can figure out how to fit it all into a day aswell as look after my other child!).
Its not easy but with perseverance & support from your local breastfeeding team (ask your community midwives for their contact details) you may well be able to get things re-established. Good luck!