No napping

Nina • Mama of twin girls
So my babies are on this nap refusal strike. One of them is up from 1am-11am and the other from 10am-6pm. They are sleeping in longer stretches but it is exhausting on all of us! How do I get them to nap and be consistent. I managed to get them to sleep part of the night at the same time but one of them loves to be up in the AM 😢😰