Just a heads up, queen might have run out of sperm to fertilise the eggs she's laying. This means you still have a queen, she's just worthless now.
If you really do have laying workers then you can do what I did: add a frame of brood in all stages every 6 days, and keep checking the other frames if they still contain the typical worker eggs: lots of eggs in every cell. As soon as you cant find any more eggs in the frames that you did not add yourself, introduce A queen in a cage and add 2 frames of brood, preferably frames where the bees are hatching if you can find them. These bees will accept and feed that introduced queen right away.
Keep the queen in the cage for at least 4 days so the hive gets used to her scent but can't get to her. After this open the cage and plug the exit with some sugar dough. The bees will eat the dough and will set free the queen. Now you saved your hive and safely introduced a new queen
this method took me about a month before the laying workers disappeared but it worked, and that's what counts for me