please help

today I check to see what shape my thermostat was in. when I removed the hoes form the pipe that goes into the engine the thermostat was on the pipe not the hoes. I removed the thermostat and coolant started to come out. I then put everything back. I started to put coolant back in when I saw that the bleeder valve on top of the water housing was broken and the screw part was still in there( I could not take it out) the coolant isn’t flowing from the recover tank to the engine . also how can I get the coolant to go into the engine. and the bleeder valve was closed and there is no way for me to take it out.. please help what can I do to fix this

its a 96 cavalier sedan with the 2.2l