My DD is nearly 3 and understands what the potty and toilet are for but won't use them. She won't even tell us when she's done a poo in her nappy.
She will occasionally use the toilet for a wee but refuses to wear pants. When we've tried she just wees where she is and says 'I've done a wee' calmly. We've tried...
Sticker rewards
Sweetie rewards 
Not reacting badly when she has an accident
Just relaxing and deciding to leave it till 'she's ready'
I'm assuming this is some kind of power/control thing as in ... 'you can't make me.'
Any advice please?