I've breastfed seven children and am still breastfeeding the last two (2.5 and 14 months) I have had really good successes in hospital when they were born with feeding 5 of them, who were sleepy and content. But two of them seemed absolutely starving, frustrated, and unwilling to want to feed.
I ordered a ready made formula bottle for them (in different situations) and found that after their hunger was satiated they were more open-minded to try the breast.
I got hooks and daggers from the nurses when I suggested this to a new mum in the ward at my last birth who was struggling to feed her baby. The baby was screaming and howling really loudly, and her voice was muffled by the woman's breasts, as she was just forcing them into her open mouth as she screamed. There was no way that baby was going to feed in that state!
I contend that formula has its uses in small cases before the milk comes in and your baby is hungry.
The advice I would give to this technique would be to stand up tall to the person rejecting your requests AND continue to have your baby suckling your own breast as often as you can, waking them in sleep and putting them to the breast when sleepy and more open minded.
I would appreciate any feedback to my ideas.