How to expand and combine mirror drawing for editing components separately

Hello, I have a design I created using the transform mirror tool. I created the guideline using the pen tool and reflection across that axis by drawing with the blob brush tool. Now that the design is finished, I don't know how to get everything that was drawn to combine into one vector so that I can fill individual sections and recolor it. If I delete the vertical reflect line, it causes both sides to come to the center. Even after selecting everything on the mirror layer and expanding, it doesn't remove the mirror function. please help!