My sister has bad back problems, help!!!

My sister used to throw the disk and hammer for track and field. About three years ago she began to have back pains so she went to the docter and all they would do is give her pain killers. She than decided to go to a chiropractic and there they told her that her cervical vertabrae did not have the curve it should and also that her lumber vertabrae was rotating when it shouldn't. They also told her she had to go a total of 70 times in order for her back to be normal again. thing is she has gone a total of about 37 times and she does not feel the difference! she has ask them why she is still hurting and they don't seem to know the problem. so my question is what could be the problem? and what can she do to feel better at least for a little while?