Hi,
I saw your post title and though 'ha! that rings a bell". Our DD is meant to get top up feeds and also refusing the bottle- we had a late posterior tie and she slipped down centiles. She's now 11weeks. She used to take a bottle, and for a while I was even worried she might develop flow preference, but I spent so long trying to persuade her breast is best she wouldn't take a bottle anymore.
I got an SNS, and it is good- but leaks something rotten. There's stuff on the internet about making your own, which will probably be cheaper and not leak.
have you got a syringe- for those days when he just will not take the bottle you can at least force it in.
Our DD ended up in hospital this last week, due to weight loss- they gave her her top ups down a tube for a few days to teach her to be full which actually really helped us, so don't despair, if it gets too bad there are things they can do.
It's still very sporadic when she'll take a bottle. Things we've done that I think may be advice to pass on:
-warming the milk definitely seems to help
-i'd say she prefers EBM. I express after every feed to keep supply up. I've got a double pump and a hands free pumping bra. If your going to do any expressing I can't recommend the hands free bra more. You can actually do stuff whilst you pump- like answer posts on MN...
-we're using the little yellow teats you get in hospital for the SMA bottles
-dipping the end of the teat in the milk also seems to help
-Finally, and my mum discovered this by accident after misunderstanding the instructions about heating the milk- dipping the teat in hot water to warm it seemed to help convince DD she was getting a nice warm boobie.
Bottle wise- we tried a breastflow and weren't too impressed. The milk all pools in the top and gets airlocked. Got a medela calma to try soon too as it's meant to be like breastfeeding, but as it's another skill to learn think we'll let her put on some more weight first.
Hang in there - it will get better. Feel free to PM if you want a chat.