How to make the girls come back to life

Hello everyone! So as the title states, I am curious as to any helpful hints for dealing with saggy breasts. I didn't know what a bra was u til I was starting high school and by then, the damage was done. I wasn't taught properly how to take care of myself at a young age. Needless to say, I am extremely unhappy with my body. Surgeries aren't an option. Are there any exercises or anything at all that can help my situation? Please? Thank you lovely ladies for any help in advance!