Visitation to see my 2 kids

Mother will not let me see the kids unless I go by her schedule on the weekends I work on the weekends and have 2 days off a week she already know my work schedule but has tried to force me in a situation I can not handle I need rights to see them at least twice a week and for there mother not to block me on there cell she cut anyway of contact with me off not sure why I got over 10 years or proof I been in there life’s I need my rights fixed please we were co parenting for a while then she got a boyfriend and things got crazy for my boys I need them in my life as much as they need me please help with this situation thank you