Look this may sound a bit tough, but l found it the best way, after stragerling for a month or so, replacing feeds hear and there. I decided to cut breast out all together when my son was 6 month. I offered him the formula a couple of times, all he did was cry and cry and cry. It was heart breaking, but l didn't give him the breast, this went on for most of the day, a couple of sips from the bottle but thats it. That same afternoon he took the bottle and has never looked back. Soon after he refused the breast. Through out this day l gave him water and normal solids. I discussed this way of doing it with my maternal nurse, she was very encouraging and asured me that it would not hurt him in any way.
I also used the fat pigeon teats, there great.
Hope this helps. Just keep on trying.
My son is now in day care and l have been working on a part time basis for 5 month, could not have done it if he was still on the breast.