Mine used to be exactly the same Betula, going crazy, whining and yapping as soon as the collars came out. It got so irritating. So........when I got collars out one day. I just sat with them in my hand until they both calmed down. It took an hour and a half. Put collars on........going mad again. I sat again till they stopped and laid down.....took 20 mins. (All this was done saying nothing, looking at them or getting angry)
Every time I stood up they went mad.....sat back down. Like a yoyo for at least an hour, same applied to the lead! It took hours to get out the first time, but if you are committed and dont give in your actions speak volumes louder than any words.
Every day will be the same but the time will reduce considerably each time with consistancy. Its as if they will test you every time to find your weakness. You, the leader must not get angry or lose patience, Belle can only leave the house with you when you take the initiative. Keep her on a lead for a good fortnight so you remain in control.
You will hopefully find once she accepts you as leader she will stop the trouser pulling as well.
This takes lots of willpower on your part, I have been successful with a lot of patience. I wish you all the best Betula. Keep us posted.