Partner taken my children

ttc number 5💪🌈❤️26 and blunt!!

So I split with my partner the other day and he was obv very upset he cane to take the kids out the next day seemed ok later called me and said he isn’t bringing them back it’s day 2 now and not seen them he has also called social services and told them I’m on drugs and my kids aren’t safe I’m not allowed them back yet I’m so heartbroken I don’t know what to do please help me I have to see solicitor tomorrow but I’m so scared