Right sorry :P I did
screen -S PhantasyCraft -X stuff "command^M"
^M can be gotten by typing it in manually or pressing control + V then control + M
Commmand is replaced with the command you want to send to the screen in my case stop is the command.
^M is like pressing enter so that it doens't just send the text to it but also runs the command
Hope this helps anyone that looks at this and needs this solution