Today is the first day I have been able to bottle feed my 5mth old little girl. I live in the Waikato and went to the Family Centre here, they are fantastic. But anyway how we did it...it sounds terrible but you just need good support. I breast feed last night at 10pm then nothing till 9am the next morning ( not so bad as she sleeps thru the night) then at 9am we gave her a bottle, I left the room and they feed her, took sometime and crying but she took 180ml, then I had a go halfway thru the next feed and she was good, a few tears to start with but 220ml was taken. The third feed was me by myself at home, no tears and 220ml was downed within minutes.
We tried many times before this to get her on a bottle and tried Avent and the Tommee Tippee breast to bottle and she would not have a bar of it, but today we used the Nuk teats Cross cut 102F, they fit any standard bottle.
Good luck, hopefully you have already got it sorted!!