I can totally symphathize!!
I have 3 kids, two boys and then this little sassy girl who is now almost 3.5.
My boys were totally easy....everyone told me girls were easier
She was my biggest nightmare!
We started training last summer and she TOTALLY refused! She drove me nuts. I did the cold turkey thing, as that is what I did with my boys, but she was peeing all over the place like a puppy.....she could have cared less!
Eventually I put her back in pull ups....she had to wear panties to school. For the longest time she simply held it all day and literally POPPED when she got home....<sigh> After a few months she started going at school but not for me at home...How's THAT for frustrating???!!
I quickly realized that it was a total power struggle....so I just had to "let it go". My ped told me to not react, only to praise what I wanted....easier said than done. She finally just asked to go....I doubted her and said "Really? You never go..." she begged and said "I promise I'll go" and lo and behold she did! That was back in Feb and she was fine for pee after that.....
Poop of course was another battle.......UGHHHHHH She absolutely refused again to sit on potty or go in a pullup....always in her panties....
I tried everything again, stickers, candy etc... I even had a big Mariposa Barbie (she really wanted it) on the back of the toilet just staring at her for MONTHS!! Guess she didn't want it bad enough....
The final breakthrough with poop was she wanted something at the store (swim goggles) we were there to get them for her and her brothers, and yep....pooped in her pants in Target! I was SOOOO MAD. She didn't get the goggles....screamed and cried the whole way to the checkout. We went to the bathroom where I took of her panties and tossed them in the trash, she was HORRIFIED. Now, I must say, I had thrown some out before at home, she knew I had....but I think she maybe thought those were still around
because we were at home... She cried and cried in the car and said "I;m never going to poop in my pants ever again" and she didn't!
I guess the moral of this long story is....
those stubborn ones just have to figure it out on their own....they ain't gonna conform....
Hang in there!!!