Can anyone advise how to deal with twin toddlers waking through the night?

My twins have always been fantastic sleepers. They were sleeping through the night - from 11am until 8am - from 6 months and have got better and better and were sleeping from 7.30pm until 7.30am every morning until a month ago when they turned 2. They go to bed ok after a bath and milk but wake continously through the night. They do use soothers/pacifiers and rely heavily on these to help them calm down at night. I never wanted to use soothers but they were born 7 weeks prematurely and in neonatal for a few weeks so soothers were used to help them progress their sucking. I am struggling with controlled crying and multiple bottle feeds just to get some sleep each night. I have to add that I am a lone parent so its an added complication. Any tips or help desperately needed. Thanks