Having been through eneurisis clinic with my dd age 10, here is what we were told (and it worked, took over a year but she is also disabled, which made it a bit trickier)
First off, ditch the pull ups, they fool the brain into thinking it is ok to pee. Get a couple of duvets that fit in a washing machine (if you have one) or go for smaller layers of blankets that are easy to wash
No red or fizzy drinks (orange ones are ok, no red fresh juices and no sparkling water)
Do bladder training:- lots of water, lots of loo breaks, so....
wake up, loo, large mug of water
breakfast, large mug of water, loo
ariving school, loo, water
break loo water
lunch, loo water and so on up to dinner/tea time. The loo breaks are important, don't know why, but don't just go to loo when you need it
Drink with dinner as usual. After dinner, only drink to satisfy thirst, no gulping. If you have done all the water/loo breaks during the day, they should be well hydrated
We started seeing results in the 1st week, was dry 90% after 4 months and now only wets once in maybe 12 weeks (like i said, she has a disability adnd bladder problems so it took longer than usual)
Hope that helps