Failed restore bootcamp

Can anyone help me , i have failed restored bootcamp from my mac. My bad for not opening the Boot camp assistant first (i just found out about this after this incident),

instead i open Disk utility and click erase on the bootcamp, after finished i checked the startup disk and the Bootcamp is gone. BUT.. my storage is not restored to the mac yet, the bootcamp is still there.

Then i tried to open Boot Camp Assistant, click continue, but there's a message saying my disk is full and i need 42GB to continue.

What is this.. can someone help me and guide me so i can permanently delete the bootcamp and having only the mac for my storage please please please im begging