I don't think anyone trying to cheat would do it with something that doctors and sports scientists are even sure provides an advantage but potentially means ending your career and losing everything if caught. Kami was wrong place, wrong circumstances, etc.
No tennis player is taking this old person's medication that costs pennies, developed in the 70's, seemingly undiscovered until 2015, to gain an advantage worth risking their entire career and reputation.
Anyway, Kamila whether the worst person in the world and as a 15 year old child pumped herself full of something that many doctors don't think provides an advantage, or just caught up in some kind of contamination with something else she took (or sabotaged by a jealous person), she has paid the price, she has served her punishment, so she should be welcomed back with open arms.